diff --git a/Cargo.lock b/Cargo.lock
index d2f5114f..9ff66b17 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -106,7 +106,7 @@ checksum = "a66537f1bb974b254c98ed142ff995236e81b9d0fe4db0575f46612cb15eb0f9"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.48",
+ "syn 2.0.96",
 ]
 
 [[package]]
@@ -174,7 +174,7 @@ dependencies = [
  "heck",
  "proc-macro2",
  "quote",
- "syn 2.0.48",
+ "syn 2.0.96",
 ]
 
 [[package]]
@@ -274,7 +274,7 @@ dependencies = [
  "heck",
  "proc-macro2",
  "quote",
- "syn 2.0.48",
+ "syn 2.0.96",
 ]
 
 [[package]]
@@ -913,6 +913,8 @@ dependencies = [
  "linked_list_allocator",
  "ms_hostcall",
  "ms_std_proc_macro",
+ "serde",
+ "serde_json",
  "spin 0.9.8",
  "thiserror-no-std",
  "unwinding",
@@ -924,7 +926,7 @@ version = "0.1.0"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.48",
+ "syn 2.0.96",
 ]
 
 [[package]]
@@ -971,7 +973,7 @@ checksum = "5b4123e70df5fe0bb370cff166ae453b9c5324a2cfc932c0f7e55498147a0475"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.48",
+ "syn 2.0.96",
 ]
 
 [[package]]
@@ -1052,7 +1054,7 @@ checksum = "4359fd9c9171ec6e8c62926d6faaf553a8dc3f64e1507e76da7911b4f6a04405"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.48",
+ "syn 2.0.96",
 ]
 
 [[package]]
@@ -1081,9 +1083,9 @@ dependencies = [
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.76"
+version = "1.0.93"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "95fc56cda0b5c3325f5fbbd7ff9fda9e02bb00bb3dac51252d2f1bfa1cb8cc8c"
+checksum = "60946a68e5f9d28b0dc1c21bb8a97ee7d018a8b322fa57838ba31cc878e22d99"
 dependencies = [
  "unicode-ident",
 ]
@@ -1214,31 +1216,32 @@ checksum = "836fa6a3e1e547f9a2c4040802ec865b5d85f4014efe00555d7090a3dcaa1090"
 
 [[package]]
 name = "serde"
-version = "1.0.195"
+version = "1.0.217"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "63261df402c67811e9ac6def069e4786148c4563f4b50fd4bf30aa370d626b02"
+checksum = "02fc4265df13d6fa1d00ecff087228cc0a2b5f3c0e87e258d8b94a156e984c70"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.195"
+version = "1.0.217"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "46fe8f8603d81ba86327b23a2e9cdf49e1255fb94a4c5f297f6ee0547178ea2c"
+checksum = "5a9bf7cf98d04a2b28aead066b7496853d4779c9cc183c440dbac457641e19a0"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.48",
+ "syn 2.0.96",
 ]
 
 [[package]]
 name = "serde_json"
-version = "1.0.111"
+version = "1.0.135"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "176e46fa42316f18edd598015a5166857fc835ec732f5215eac6b7bdbf0a84f4"
+checksum = "2b0d7ba2887406110130a978386c4e1befb98c674b4fba677954e4db976630d9"
 dependencies = [
  "itoa",
+ "memchr",
  "ryu",
  "serde",
 ]
@@ -1366,9 +1369,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.48"
+version = "2.0.96"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0f3531638e407dfc0814761abb7c00a5b54992b849452a0646b7f65c9f770f3f"
+checksum = "d5d0adab1ae378d7f53bdebc67a39f1f151407ef230f0ce2883572f5d8985c80"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1413,7 +1416,7 @@ checksum = "a4558b58466b9ad7ca0f102865eccc95938dca1a74a856f2b57b6629050da261"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.48",
+ "syn 2.0.96",
 ]
 
 [[package]]
@@ -1460,7 +1463,7 @@ checksum = "5b8a1e28f2deaa14e508979454cb3a223b10b938b45af148bc0986de36f1923b"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.48",
+ "syn 2.0.96",
 ]
 
 [[package]]
@@ -1660,7 +1663,7 @@ dependencies = [
  "anyhow",
  "proc-macro2",
  "quote",
- "syn 2.0.48",
+ "syn 2.0.96",
  "wasmtime-component-util",
  "wasmtime-wit-bindgen",
  "wit-parser",
@@ -1758,7 +1761,7 @@ checksum = "de5a9bc4f44ceeb168e9e8e3be4e0b4beb9095b468479663a9e24c667e36826f"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.48",
+ "syn 2.0.96",
 ]
 
 [[package]]
@@ -2034,5 +2037,5 @@ checksum = "fa4f8080344d4671fb4e831a13ad1e68092748387dfc4f55e356242fae12ce3e"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.48",
+ "syn 2.0.96",
 ]
diff --git a/common_service/fatfs/Cargo.lock b/common_service/fatfs/Cargo.lock
index 03c6fff0..4b992e67 100644
--- a/common_service/fatfs/Cargo.lock
+++ b/common_service/fatfs/Cargo.lock
@@ -174,6 +174,12 @@ dependencies = [
  "cc",
 ]
 
+[[package]]
+name = "itoa"
+version = "1.0.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d75a2a4b1b190afb6f5425f10f6a8f959d2ea0b9c2b1d79553551850539e4674"
+
 [[package]]
 name = "js-sys"
 version = "0.3.66"
@@ -214,6 +220,12 @@ version = "0.4.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b5e6163cb8c49088c2c36f57875e58ccd8c87c7427f7fbd50ea6710b2f3f2e8f"
 
+[[package]]
+name = "memchr"
+version = "2.7.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "78ca9ab1a0babb1e7d5695e3530886289c18cf2f87ec19a575a0abdce112e3a3"
+
 [[package]]
 name = "ms_hostcall"
 version = "0.1.0"
@@ -232,6 +244,8 @@ dependencies = [
  "linked_list_allocator",
  "ms_hostcall",
  "ms_std_proc_macro",
+ "serde",
+ "serde_json",
  "spin",
  "thiserror-no-std",
 ]
@@ -242,7 +256,7 @@ version = "0.1.0"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 1.0.109",
 ]
 
 [[package]]
@@ -262,18 +276,18 @@ checksum = "dd8b5dd2ae5ed71462c540258bedcb51965123ad7e7ccf4b9a8cafaa4a63576d"
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.70"
+version = "1.0.93"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "39278fbbf5fb4f646ce651690877f89d1c5811a3d4acb27700c1cb3cdb78fd3b"
+checksum = "60946a68e5f9d28b0dc1c21bb8a97ee7d018a8b322fa57838ba31cc878e22d99"
 dependencies = [
  "unicode-ident",
 ]
 
 [[package]]
 name = "quote"
-version = "1.0.33"
+version = "1.0.38"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5267fca4496028628a95160fc423a33e8b2e6af8a5302579e322e4b520293cae"
+checksum = "0e4dccaaaf89514f546c693ddc140f729f958c247918a13380cccc6078391acc"
 dependencies = [
  "proc-macro2",
 ]
@@ -287,6 +301,12 @@ dependencies = [
  "semver",
 ]
 
+[[package]]
+name = "ryu"
+version = "1.0.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f3cb5ba0dc43242ce17de99c180e96db90b235b8a9fdc9543c96d2209116bd9f"
+
 [[package]]
 name = "scopeguard"
 version = "1.2.0"
@@ -299,6 +319,38 @@ version = "1.0.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "836fa6a3e1e547f9a2c4040802ec865b5d85f4014efe00555d7090a3dcaa1090"
 
+[[package]]
+name = "serde"
+version = "1.0.217"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "02fc4265df13d6fa1d00ecff087228cc0a2b5f3c0e87e258d8b94a156e984c70"
+dependencies = [
+ "serde_derive",
+]
+
+[[package]]
+name = "serde_derive"
+version = "1.0.217"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5a9bf7cf98d04a2b28aead066b7496853d4779c9cc183c440dbac457641e19a0"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.96",
+]
+
+[[package]]
+name = "serde_json"
+version = "1.0.135"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2b0d7ba2887406110130a978386c4e1befb98c674b4fba677954e4db976630d9"
+dependencies = [
+ "itoa",
+ "memchr",
+ "ryu",
+ "serde",
+]
+
 [[package]]
 name = "spin"
 version = "0.9.8"
@@ -336,9 +388,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.39"
+version = "2.0.96"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "23e78b90f2fcf45d3e842032ce32e3f2d1545ba6636271dcbf24fa306d87be7a"
+checksum = "d5d0adab1ae378d7f53bdebc67a39f1f151407ef230f0ce2883572f5d8985c80"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -392,7 +444,7 @@ dependencies = [
  "once_cell",
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 2.0.96",
  "wasm-bindgen-shared",
 ]
 
@@ -414,7 +466,7 @@ checksum = "f0eb82fcb7930ae6219a7ecfd55b217f5f0893484b7a13022ebb2b2bf20b5283"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 2.0.96",
  "wasm-bindgen-backend",
  "wasm-bindgen-shared",
 ]
diff --git a/common_service/fdtab/Cargo.lock b/common_service/fdtab/Cargo.lock
index 4cfc27b8..6a3f511f 100644
--- a/common_service/fdtab/Cargo.lock
+++ b/common_service/fdtab/Cargo.lock
@@ -79,6 +79,12 @@ dependencies = [
  "stable_deref_trait",
 ]
 
+[[package]]
+name = "itoa"
+version = "1.0.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d75a2a4b1b190afb6f5425f10f6a8f959d2ea0b9c2b1d79553551850539e4674"
+
 [[package]]
 name = "libc"
 version = "0.2.150"
@@ -104,6 +110,12 @@ dependencies = [
  "scopeguard",
 ]
 
+[[package]]
+name = "memchr"
+version = "2.7.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "78ca9ab1a0babb1e7d5695e3530886289c18cf2f87ec19a575a0abdce112e3a3"
+
 [[package]]
 name = "ms_hostcall"
 version = "0.1.0"
@@ -122,6 +134,8 @@ dependencies = [
  "linked_list_allocator",
  "ms_hostcall",
  "ms_std_proc_macro",
+ "serde",
+ "serde_json",
  "spin",
  "thiserror-no-std",
  "unwinding",
@@ -133,23 +147,23 @@ version = "0.1.0"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 1.0.109",
 ]
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.70"
+version = "1.0.93"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "39278fbbf5fb4f646ce651690877f89d1c5811a3d4acb27700c1cb3cdb78fd3b"
+checksum = "60946a68e5f9d28b0dc1c21bb8a97ee7d018a8b322fa57838ba31cc878e22d99"
 dependencies = [
  "unicode-ident",
 ]
 
 [[package]]
 name = "quote"
-version = "1.0.33"
+version = "1.0.38"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5267fca4496028628a95160fc423a33e8b2e6af8a5302579e322e4b520293cae"
+checksum = "0e4dccaaaf89514f546c693ddc140f729f958c247918a13380cccc6078391acc"
 dependencies = [
  "proc-macro2",
 ]
@@ -163,6 +177,12 @@ dependencies = [
  "semver",
 ]
 
+[[package]]
+name = "ryu"
+version = "1.0.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f3cb5ba0dc43242ce17de99c180e96db90b235b8a9fdc9543c96d2209116bd9f"
+
 [[package]]
 name = "scopeguard"
 version = "1.2.0"
@@ -175,6 +195,38 @@ version = "1.0.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "836fa6a3e1e547f9a2c4040802ec865b5d85f4014efe00555d7090a3dcaa1090"
 
+[[package]]
+name = "serde"
+version = "1.0.217"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "02fc4265df13d6fa1d00ecff087228cc0a2b5f3c0e87e258d8b94a156e984c70"
+dependencies = [
+ "serde_derive",
+]
+
+[[package]]
+name = "serde_derive"
+version = "1.0.217"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5a9bf7cf98d04a2b28aead066b7496853d4779c9cc183c440dbac457641e19a0"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.96",
+]
+
+[[package]]
+name = "serde_json"
+version = "1.0.135"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2b0d7ba2887406110130a978386c4e1befb98c674b4fba677954e4db976630d9"
+dependencies = [
+ "itoa",
+ "memchr",
+ "ryu",
+ "serde",
+]
+
 [[package]]
 name = "spin"
 version = "0.9.8"
@@ -212,9 +264,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.39"
+version = "2.0.96"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "23e78b90f2fcf45d3e842032ce32e3f2d1545ba6636271dcbf24fa306d87be7a"
+checksum = "d5d0adab1ae378d7f53bdebc67a39f1f151407ef230f0ce2883572f5d8985c80"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/common_service/mm/Cargo.lock b/common_service/mm/Cargo.lock
index aa6112e8..5cf6b275 100644
--- a/common_service/mm/Cargo.lock
+++ b/common_service/mm/Cargo.lock
@@ -85,6 +85,12 @@ dependencies = [
  "stable_deref_trait",
 ]
 
+[[package]]
+name = "itoa"
+version = "1.0.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d75a2a4b1b190afb6f5425f10f6a8f959d2ea0b9c2b1d79553551850539e4674"
+
 [[package]]
 name = "lazy_static"
 version = "1.4.0"
@@ -119,6 +125,12 @@ dependencies = [
  "scopeguard",
 ]
 
+[[package]]
+name = "memchr"
+version = "2.7.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "78ca9ab1a0babb1e7d5695e3530886289c18cf2f87ec19a575a0abdce112e3a3"
+
 [[package]]
 name = "mm"
 version = "0.1.0"
@@ -150,6 +162,8 @@ dependencies = [
  "linked_list_allocator",
  "ms_hostcall",
  "ms_std_proc_macro",
+ "serde",
+ "serde_json",
  "spin 0.9.8",
  "thiserror-no-std",
 ]
@@ -160,7 +174,7 @@ version = "0.1.0"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 1.0.109",
 ]
 
 [[package]]
@@ -171,18 +185,18 @@ checksum = "dd8b5dd2ae5ed71462c540258bedcb51965123ad7e7ccf4b9a8cafaa4a63576d"
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.70"
+version = "1.0.93"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "39278fbbf5fb4f646ce651690877f89d1c5811a3d4acb27700c1cb3cdb78fd3b"
+checksum = "60946a68e5f9d28b0dc1c21bb8a97ee7d018a8b322fa57838ba31cc878e22d99"
 dependencies = [
  "unicode-ident",
 ]
 
 [[package]]
 name = "quote"
-version = "1.0.33"
+version = "1.0.38"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5267fca4496028628a95160fc423a33e8b2e6af8a5302579e322e4b520293cae"
+checksum = "0e4dccaaaf89514f546c693ddc140f729f958c247918a13380cccc6078391acc"
 dependencies = [
  "proc-macro2",
 ]
@@ -196,6 +210,12 @@ dependencies = [
  "semver",
 ]
 
+[[package]]
+name = "ryu"
+version = "1.0.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f3cb5ba0dc43242ce17de99c180e96db90b235b8a9fdc9543c96d2209116bd9f"
+
 [[package]]
 name = "scopeguard"
 version = "1.2.0"
@@ -208,6 +228,38 @@ version = "1.0.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "836fa6a3e1e547f9a2c4040802ec865b5d85f4014efe00555d7090a3dcaa1090"
 
+[[package]]
+name = "serde"
+version = "1.0.217"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "02fc4265df13d6fa1d00ecff087228cc0a2b5f3c0e87e258d8b94a156e984c70"
+dependencies = [
+ "serde_derive",
+]
+
+[[package]]
+name = "serde_derive"
+version = "1.0.217"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5a9bf7cf98d04a2b28aead066b7496853d4779c9cc183c440dbac457641e19a0"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.96",
+]
+
+[[package]]
+name = "serde_json"
+version = "1.0.135"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2b0d7ba2887406110130a978386c4e1befb98c674b4fba677954e4db976630d9"
+dependencies = [
+ "itoa",
+ "memchr",
+ "ryu",
+ "serde",
+]
+
 [[package]]
 name = "spin"
 version = "0.5.2"
@@ -251,9 +303,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.39"
+version = "2.0.96"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "23e78b90f2fcf45d3e842032ce32e3f2d1545ba6636271dcbf24fa306d87be7a"
+checksum = "d5d0adab1ae378d7f53bdebc67a39f1f151407ef230f0ce2883572f5d8985c80"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -309,5 +361,5 @@ checksum = "dd7e48ccf166952882ca8bd778a43502c64f33bf94c12ebe2a7f08e5a0f6689f"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 2.0.96",
 ]
diff --git a/common_service/mm/src/faas_buffer/mod.rs b/common_service/mm/src/faas_buffer/mod.rs
index 54f9126c..64b35848 100644
--- a/common_service/mm/src/faas_buffer/mod.rs
+++ b/common_service/mm/src/faas_buffer/mod.rs
@@ -37,8 +37,12 @@ pub fn buffer_alloc(slot: &str, l: Layout, fingerprint: u64) -> MMResult<usize>
 
 #[no_mangle]
 pub fn access_buffer(slot: &str) -> Option<(usize, u64)> {
-    // *RAW_P.lock().take()
-    BUFFER_REGISTER.lock().get(slot).take().copied()
+    let mut register = BUFFER_REGISTER.lock();
+    // ms_std::println!("buffer register: ");
+    // for (k, v) in register.iter() {
+    //     ms_std::println!("  {}: {:?}", k, v);
+    // }
+    register.remove(slot)
 }
 
 #[no_mangle]
diff --git a/common_service/mmap_file_backend/Cargo.lock b/common_service/mmap_file_backend/Cargo.lock
index 1031e97b..b9731859 100644
--- a/common_service/mmap_file_backend/Cargo.lock
+++ b/common_service/mmap_file_backend/Cargo.lock
@@ -34,7 +34,7 @@ dependencies = [
  "regex",
  "rustc-hash",
  "shlex",
- "syn 2.0.39",
+ "syn 2.0.96",
 ]
 
 [[package]]
@@ -128,6 +128,12 @@ dependencies = [
  "stable_deref_trait",
 ]
 
+[[package]]
+name = "itoa"
+version = "1.0.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d75a2a4b1b190afb6f5425f10f6a8f959d2ea0b9c2b1d79553551850539e4674"
+
 [[package]]
 name = "lazy_static"
 version = "1.4.0"
@@ -215,6 +221,8 @@ dependencies = [
  "linked_list_allocator",
  "ms_hostcall",
  "ms_std_proc_macro",
+ "serde",
+ "serde_json",
  "spin",
  "thiserror-no-std",
 ]
@@ -225,7 +233,7 @@ version = "0.1.0"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 1.0.109",
 ]
 
 [[package]]
@@ -257,18 +265,18 @@ checksum = "19b17cddbe7ec3f8bc800887bab5e717348c95ea2ca0b1bf0837fb964dc67099"
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.70"
+version = "1.0.93"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "39278fbbf5fb4f646ce651690877f89d1c5811a3d4acb27700c1cb3cdb78fd3b"
+checksum = "60946a68e5f9d28b0dc1c21bb8a97ee7d018a8b322fa57838ba31cc878e22d99"
 dependencies = [
  "unicode-ident",
 ]
 
 [[package]]
 name = "quote"
-version = "1.0.33"
+version = "1.0.38"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5267fca4496028628a95160fc423a33e8b2e6af8a5302579e322e4b520293cae"
+checksum = "0e4dccaaaf89514f546c693ddc140f729f958c247918a13380cccc6078391acc"
 dependencies = [
  "proc-macro2",
 ]
@@ -317,6 +325,12 @@ dependencies = [
  "semver",
 ]
 
+[[package]]
+name = "ryu"
+version = "1.0.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f3cb5ba0dc43242ce17de99c180e96db90b235b8a9fdc9543c96d2209116bd9f"
+
 [[package]]
 name = "scopeguard"
 version = "1.2.0"
@@ -329,6 +343,38 @@ version = "1.0.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "836fa6a3e1e547f9a2c4040802ec865b5d85f4014efe00555d7090a3dcaa1090"
 
+[[package]]
+name = "serde"
+version = "1.0.217"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "02fc4265df13d6fa1d00ecff087228cc0a2b5f3c0e87e258d8b94a156e984c70"
+dependencies = [
+ "serde_derive",
+]
+
+[[package]]
+name = "serde_derive"
+version = "1.0.217"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5a9bf7cf98d04a2b28aead066b7496853d4779c9cc183c440dbac457641e19a0"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.96",
+]
+
+[[package]]
+name = "serde_json"
+version = "1.0.135"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2b0d7ba2887406110130a978386c4e1befb98c674b4fba677954e4db976630d9"
+dependencies = [
+ "itoa",
+ "memchr",
+ "ryu",
+ "serde",
+]
+
 [[package]]
 name = "shlex"
 version = "1.2.0"
@@ -372,9 +418,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.39"
+version = "2.0.96"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "23e78b90f2fcf45d3e842032ce32e3f2d1545ba6636271dcbf24fa306d87be7a"
+checksum = "d5d0adab1ae378d7f53bdebc67a39f1f151407ef230f0ce2883572f5d8985c80"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -398,7 +444,7 @@ checksum = "266b2e40bc00e5a6c09c3584011e08b06f123c00362c92b975ba9843aaaa14b8"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 2.0.96",
 ]
 
 [[package]]
diff --git a/common_service/ruxfdtab/Cargo.lock b/common_service/ruxfdtab/Cargo.lock
index 03f2c4ad..aa7f94b2 100644
--- a/common_service/ruxfdtab/Cargo.lock
+++ b/common_service/ruxfdtab/Cargo.lock
@@ -164,7 +164,7 @@ checksum = "6af24c4862260a825484470f5526a91ad1031e04ab899be62478241231f62b46"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.77",
+ "syn 2.0.87",
 ]
 
 [[package]]
@@ -183,7 +183,7 @@ dependencies = [
  "proc-macro2",
  "quote",
  "rustc_version 0.4.1",
- "syn 2.0.77",
+ "syn 2.0.87",
 ]
 
 [[package]]
@@ -330,6 +330,12 @@ dependencies = [
  "hashbrown",
 ]
 
+[[package]]
+name = "itoa"
+version = "1.0.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d75a2a4b1b190afb6f5425f10f6a8f959d2ea0b9c2b1d79553551850539e4674"
+
 [[package]]
 name = "kernel_guard"
 version = "0.1.1"
@@ -418,6 +424,8 @@ dependencies = [
  "linked_list_allocator",
  "ms_hostcall",
  "ms_std_proc_macro",
+ "serde",
+ "serde_json",
  "spin",
  "thiserror-no-std",
 ]
@@ -428,7 +436,7 @@ version = "0.1.0"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.77",
+ "syn 1.0.109",
 ]
 
 [[package]]
@@ -502,7 +510,7 @@ source = "git+https://github.com/anti-entropy123/ruxos/#69217283ca94c10d6b084be7
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.77",
+ "syn 2.0.87",
 ]
 
 [[package]]
@@ -697,6 +705,12 @@ dependencies = [
  "ruxhal",
 ]
 
+[[package]]
+name = "ryu"
+version = "1.0.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f3cb5ba0dc43242ce17de99c180e96db90b235b8a9fdc9543c96d2209116bd9f"
+
 [[package]]
 name = "sbi-rt"
 version = "0.0.3"
@@ -741,22 +755,34 @@ checksum = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
 
 [[package]]
 name = "serde"
-version = "1.0.210"
+version = "1.0.217"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c8e3592472072e6e22e0a54d5904d9febf8508f65fb8552499a1abc7d1078c3a"
+checksum = "02fc4265df13d6fa1d00ecff087228cc0a2b5f3c0e87e258d8b94a156e984c70"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.210"
+version = "1.0.217"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "243902eda00fad750862fc144cea25caca5e20d615af0a81bee94ca738f1df1f"
+checksum = "5a9bf7cf98d04a2b28aead066b7496853d4779c9cc183c440dbac457641e19a0"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.77",
+ "syn 2.0.87",
+]
+
+[[package]]
+name = "serde_json"
+version = "1.0.135"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2b0d7ba2887406110130a978386c4e1befb98c674b4fba677954e4db976630d9"
+dependencies = [
+ "itoa",
+ "memchr",
+ "ryu",
+ "serde",
 ]
 
 [[package]]
@@ -811,9 +837,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.77"
+version = "2.0.87"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9f35bcdf61fd8e7be6caf75f429fdca8beb3ed76584befb503b1569faee373ed"
+checksum = "25aa4ce346d03a6dcd68dd8b4010bcb74e54e62c90c573f394c46eae99aba32d"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/common_service/signal/Cargo.lock b/common_service/signal/Cargo.lock
index ef6ace57..e75563ad 100644
--- a/common_service/signal/Cargo.lock
+++ b/common_service/signal/Cargo.lock
@@ -51,7 +51,7 @@ dependencies = [
  "proc-macro2",
  "quote",
  "rustc_version",
- "syn 2.0.79",
+ "syn 2.0.87",
 ]
 
 [[package]]
@@ -73,6 +73,12 @@ dependencies = [
  "stable_deref_trait",
 ]
 
+[[package]]
+name = "itoa"
+version = "1.0.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d75a2a4b1b190afb6f5425f10f6a8f959d2ea0b9c2b1d79553551850539e4674"
+
 [[package]]
 name = "linked_list_allocator"
 version = "0.10.5"
@@ -92,6 +98,12 @@ dependencies = [
  "scopeguard",
 ]
 
+[[package]]
+name = "memchr"
+version = "2.7.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "78ca9ab1a0babb1e7d5695e3530886289c18cf2f87ec19a575a0abdce112e3a3"
+
 [[package]]
 name = "ms_hostcall"
 version = "0.1.0"
@@ -110,6 +122,8 @@ dependencies = [
  "linked_list_allocator",
  "ms_hostcall",
  "ms_std_proc_macro",
+ "serde",
+ "serde_json",
  "spin",
  "thiserror-no-std",
 ]
@@ -120,7 +134,7 @@ version = "0.1.0"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.79",
+ "syn 1.0.109",
 ]
 
 [[package]]
@@ -159,6 +173,12 @@ dependencies = [
  "semver",
 ]
 
+[[package]]
+name = "ryu"
+version = "1.0.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f3cb5ba0dc43242ce17de99c180e96db90b235b8a9fdc9543c96d2209116bd9f"
+
 [[package]]
 name = "scopeguard"
 version = "1.2.0"
@@ -171,6 +191,38 @@ version = "1.0.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "61697e0a1c7e512e84a621326239844a24d8207b4669b41bc18b32ea5cbf988b"
 
+[[package]]
+name = "serde"
+version = "1.0.217"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "02fc4265df13d6fa1d00ecff087228cc0a2b5f3c0e87e258d8b94a156e984c70"
+dependencies = [
+ "serde_derive",
+]
+
+[[package]]
+name = "serde_derive"
+version = "1.0.217"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5a9bf7cf98d04a2b28aead066b7496853d4779c9cc183c440dbac457641e19a0"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.87",
+]
+
+[[package]]
+name = "serde_json"
+version = "1.0.135"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2b0d7ba2887406110130a978386c4e1befb98c674b4fba677954e4db976630d9"
+dependencies = [
+ "itoa",
+ "memchr",
+ "ryu",
+ "serde",
+]
+
 [[package]]
 name = "shlex"
 version = "1.3.0"
@@ -223,9 +275,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.79"
+version = "2.0.87"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "89132cd0bf050864e1d38dc3bbc07a0eb8e7530af26344d3d2bbbef83499f590"
+checksum = "25aa4ce346d03a6dcd68dd8b4010bcb74e54e62c90c573f394c46eae99aba32d"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/common_service/socket/Cargo.lock b/common_service/socket/Cargo.lock
index 3005eeec..b88d7d9e 100644
--- a/common_service/socket/Cargo.lock
+++ b/common_service/socket/Cargo.lock
@@ -58,7 +58,7 @@ dependencies = [
  "proc-macro-error",
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 2.0.96",
 ]
 
 [[package]]
@@ -113,6 +113,12 @@ dependencies = [
  "stable_deref_trait",
 ]
 
+[[package]]
+name = "itoa"
+version = "1.0.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d75a2a4b1b190afb6f5425f10f6a8f959d2ea0b9c2b1d79553551850539e4674"
+
 [[package]]
 name = "lazy_static"
 version = "1.4.0"
@@ -156,6 +162,12 @@ version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0ca88d725a0a943b096803bd34e73a4437208b6077654cc4ecb2947a5f91618d"
 
+[[package]]
+name = "memchr"
+version = "2.7.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "78ca9ab1a0babb1e7d5695e3530886289c18cf2f87ec19a575a0abdce112e3a3"
+
 [[package]]
 name = "ms_hostcall"
 version = "0.1.0"
@@ -174,6 +186,8 @@ dependencies = [
  "linked_list_allocator",
  "ms_hostcall",
  "ms_std_proc_macro",
+ "serde",
+ "serde_json",
  "spin",
  "thiserror-no-std",
 ]
@@ -184,7 +198,7 @@ version = "0.1.0"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 1.0.109",
 ]
 
 [[package]]
@@ -219,18 +233,18 @@ dependencies = [
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.70"
+version = "1.0.93"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "39278fbbf5fb4f646ce651690877f89d1c5811a3d4acb27700c1cb3cdb78fd3b"
+checksum = "60946a68e5f9d28b0dc1c21bb8a97ee7d018a8b322fa57838ba31cc878e22d99"
 dependencies = [
  "unicode-ident",
 ]
 
 [[package]]
 name = "quote"
-version = "1.0.33"
+version = "1.0.38"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5267fca4496028628a95160fc423a33e8b2e6af8a5302579e322e4b520293cae"
+checksum = "0e4dccaaaf89514f546c693ddc140f729f958c247918a13380cccc6078391acc"
 dependencies = [
  "proc-macro2",
 ]
@@ -274,6 +288,12 @@ dependencies = [
  "semver",
 ]
 
+[[package]]
+name = "ryu"
+version = "1.0.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f3cb5ba0dc43242ce17de99c180e96db90b235b8a9fdc9543c96d2209116bd9f"
+
 [[package]]
 name = "scopeguard"
 version = "1.2.0"
@@ -286,6 +306,38 @@ version = "1.0.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "836fa6a3e1e547f9a2c4040802ec865b5d85f4014efe00555d7090a3dcaa1090"
 
+[[package]]
+name = "serde"
+version = "1.0.217"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "02fc4265df13d6fa1d00ecff087228cc0a2b5f3c0e87e258d8b94a156e984c70"
+dependencies = [
+ "serde_derive",
+]
+
+[[package]]
+name = "serde_derive"
+version = "1.0.217"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5a9bf7cf98d04a2b28aead066b7496853d4779c9cc183c440dbac457641e19a0"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.96",
+]
+
+[[package]]
+name = "serde_json"
+version = "1.0.135"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2b0d7ba2887406110130a978386c4e1befb98c674b4fba677954e4db976630d9"
+dependencies = [
+ "itoa",
+ "memchr",
+ "ryu",
+ "serde",
+]
+
 [[package]]
 name = "smoltcp"
 version = "0.11.0"
@@ -354,9 +406,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.39"
+version = "2.0.96"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "23e78b90f2fcf45d3e842032ce32e3f2d1545ba6636271dcbf24fa306d87be7a"
+checksum = "d5d0adab1ae378d7f53bdebc67a39f1f151407ef230f0ce2883572f5d8985c80"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -380,7 +432,7 @@ checksum = "266b2e40bc00e5a6c09c3584011e08b06f123c00362c92b975ba9843aaaa14b8"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 2.0.96",
 ]
 
 [[package]]
diff --git a/common_service/socket/Cargo.toml b/common_service/socket/Cargo.toml
index ead8d3db..9ab6e02f 100644
--- a/common_service/socket/Cargo.toml
+++ b/common_service/socket/Cargo.toml
@@ -9,7 +9,7 @@ edition = "2021"
 crate-type = ["dylib"]
 
 [dependencies]
-ms_std = { path = "../../ms_std", default-features = false, features = [] }
+ms_std = { path = "../../ms_std", features = [] }
 ms_hostcall = { path = "../../ms_hostcall", features = ["socket", "fatfs"] }
 
 log = "0.4.20"
@@ -33,4 +33,5 @@ smoltcp = { version = "0.11.0", default-features = false, features = [
 [features]
 log = []
 mpk = ["ms_std/mpk"]
+
 default = []
diff --git a/isol_config/pass_complex_args.json b/isol_config/pass_complex_args.json
index 0457e2e9..351edd2c 100644
--- a/isol_config/pass_complex_args.json
+++ b/isol_config/pass_complex_args.json
@@ -4,6 +4,10 @@
       "fdtab",
       "libfdtab.so"
     ],
+    [
+      "fatfs",
+      "libfatfs.so"
+    ],
     [
       "stdio",
       "libstdio.so"
diff --git a/justfile b/justfile
index 4c4132a8..94b39ce9 100644
--- a/justfile
+++ b/justfile
@@ -26,6 +26,23 @@ release_flag := if enable_release == "1" {
     "--release" 
 } else { "" }
 
+pass_args:
+    cargo build --manifest-path user/func_a/Cargo.toml && \
+        cargo build --manifest-path user/func_b/Cargo.toml
+
+map_reduce:
+    cargo build --manifest-path user/mapper/Cargo.toml && \
+        cargo build --manifest-path user/reducer/Cargo.toml
+
+parallel_sort:
+    for func in file_reader sorter splitter merger; do \
+    if ! cargo build --manifest-path user/$func/Cargo.toml; then \
+    echo "build $func failed."; \
+    exit 1; \
+    fi; \
+    done
+
+
 all_libos:
     ./scripts/build_all_common{{ if enable_mpk == "1" { "_mpk" } else { "" } }}.sh {{ release_flag }}
 
@@ -33,6 +50,11 @@ all_rust:
     just all_libos
     ./scripts/build_user.sh {{ release_flag }} {{ cmd_flag }}
 
+run_rust_test:
+    just all_libos
+    just all_rust
+    ./scripts/run_tests.sh {{ cmd_flag }}
+
 cc_flags_p1 := "-Wl,--gc-sections -nostdlib -Wl,--whole-archive"
 cc_flags_p2 := "-Wl,--no-whole-archive -shared"
 target := "x86_64-unknown-none"
@@ -99,10 +121,7 @@ c_checker_so:
             {{cc_flags_p2}} \
             -o target/{{target}}/debug/libwasmtime_checker.so
 
-run_rust_test:
-    just all_libos
-    just all_rust
-    ./scripts/run_tests.sh {{ cmd_flag }}
+
 
 wasmtime_parallel_sort: c_sorter_so c_spliter_so c_merger_so c_checker_so
     @echo "make symbol link: wasmtime_parallel_sort"
diff --git a/ms_std/Cargo.toml b/ms_std/Cargo.toml
index 19d91793..9d8ea25b 100644
--- a/ms_std/Cargo.toml
+++ b/ms_std/Cargo.toml
@@ -7,12 +7,6 @@ edition = "2021"
 [lib]
 crate-type = ["rlib"]
 
-[features]
-panic_def = []
-alloc_def = []
-mpk = ["ms_hostcall/enable_mpk"]
-
-default = []
 
 [dependencies]
 ms_hostcall = { workspace = true, features = [
@@ -33,3 +27,18 @@ linked_list_allocator = "0.10.5"
 spin = "0.9.8"
 thiserror-no-std = "2.0.2"
 heapless = "0.8"
+serde = { version = "1.0.217", default-features = false, features = [
+    # "derive",
+    # "serde_derive",
+] }
+serde_json = { version = "1.0.135", default-features = false, features = [
+    "alloc",
+] }
+
+[features]
+panic_def = []
+alloc_def = []
+mpk = ["ms_hostcall/enable_mpk"]
+file-based = []
+
+default = []
diff --git a/ms_std/src/agent.rs b/ms_std/src/agent.rs
index 0ba728ae..99ae797c 100644
--- a/ms_std/src/agent.rs
+++ b/ms_std/src/agent.rs
@@ -1,13 +1,9 @@
-use core::{alloc::Layout, borrow::Borrow, fmt::Display, mem::ManuallyDrop};
+use core::fmt::Display;
 
 use alloc::{
-    boxed::Box,
     format,
     string::{String, ToString},
 };
-use ms_hostcall::Verify;
-
-use crate::{libos::libos, println};
 
 pub type FaaSFuncResult<T> = Result<DataBuffer<T>, FaaSFuncError>;
 
@@ -34,123 +30,276 @@ impl FaaSFuncError {
     }
 }
 
-#[derive(Debug)]
-pub struct DataBuffer<T> {
-    inner: ManuallyDrop<Box<T>>,
+#[cfg(not(feature = "file-based"))]
+mod refer_based_impl {
+    use core::{alloc::Layout, borrow::Borrow, mem::ManuallyDrop};
 
-    used: bool,
-}
+    use alloc::{boxed::Box, string::String};
+    use ms_hostcall::Verify;
 
-impl<T> DataBuffer<T>
-where
-    T: Verify,
-{
-    pub fn new() -> Self
-    where
-        T: Default,
-    {
-        Self::with_slot(String::new())
+    use crate::{libos::libos, println};
+
+    #[derive(Debug)]
+    pub struct DataBuffer<T> {
+        inner: ManuallyDrop<Box<T>>,
+
+        used: bool,
     }
 
-    pub fn with_slot(slot: String) -> Self
+    impl<T> DataBuffer<T>
     where
-        T: Default,
+        T: Verify,
     {
-        let l: Layout = Layout::new::<T>();
+        pub fn new() -> Self
+        where
+            T: Default,
+        {
+            Self::with_slot(String::new())
+        }
+
+        pub fn with_slot(slot: String) -> Self
+        where
+            T: Default,
+        {
+            let l: Layout = Layout::new::<T>();
+
+            let p = if l.size() == 0 {
+                unsafe {
+                    alloc::alloc::alloc(Layout::from_size_align(4, 4).unwrap()) as usize as *mut T
+                }
+            } else {
+                let fingerprint = T::__fingerprint();
+
+                libos!(buffer_alloc(&slot, l, fingerprint)).expect("alloc failed.") as *mut T
 
-        let p = if l.size() == 0 {
-            unsafe {
-                alloc::alloc::alloc(Layout::from_size_align(4, 4).unwrap()) as usize as *mut T
+                // let val = T::default();
+                // println!("will write addr=0x{:x}", addr as usize);
+                // unsafe { core::ptr::write(addr, val) };
+            };
+
+            let inner = unsafe { Box::from_raw(p) };
+
+            Self {
+                inner: ManuallyDrop::new(inner),
+                used: false,
             }
-        } else {
-            let fingerprint = T::__fingerprint();
-            let addr =
-                libos!(buffer_alloc(&slot, l, fingerprint)).expect("alloc failed.") as *mut T;
+        }
 
-            // let val = T::default();
-            // println!("will write addr=0x{:x}", addr as usize);
-            // unsafe { core::ptr::write(addr, val) };
+        pub fn from_buffer() -> Option<Self> {
+            Self::from_buffer_slot(String::new())
+        }
 
-            addr
-        };
+        pub fn from_buffer_slot(slot: String) -> Option<Self> {
+            let buffer_meta: Option<(usize, u64)> = libos!(access_buffer(&slot));
 
-        let inner = unsafe { Box::from_raw(p) };
+            buffer_meta.map(|(raw_ptr, fingerprint)| {
+                if fingerprint != T::__fingerprint() {
+                    println!("wrong data type, {}, {}", fingerprint, T::__fingerprint());
+                    panic!("");
+                };
 
-        Self {
-            inner: ManuallyDrop::new(inner),
-            used: false,
+                let inner = unsafe { Box::from_raw(raw_ptr as *mut T) };
+
+                Self {
+                    inner: ManuallyDrop::new(inner),
+                    used: false,
+                }
+            })
         }
     }
 
-    pub fn from_buffer() -> Option<Self> {
-        Self::from_buffer_slot(String::new())
+    impl<T> Default for DataBuffer<T>
+    where
+        T: Default + Verify,
+    {
+        fn default() -> DataBuffer<T> {
+            Self::new()
+        }
     }
 
-    pub fn from_buffer_slot(slot: String) -> Option<Self> {
-        let buffer_meta: Option<(usize, u64)> = libos!(access_buffer(&slot));
+    impl<T> core::ops::Deref for DataBuffer<T>
+    where
+        T: Verify,
+    {
+        type Target = T;
 
-        buffer_meta.map(|(raw_ptr, fingerprint)| {
-            if fingerprint != T::__fingerprint() {
-                println!("wrong data type, {}, {}", fingerprint, T::__fingerprint());
-                panic!("");
-            };
+        fn deref(&self) -> &Self::Target {
+            self.inner.borrow()
+        }
+    }
+
+    impl<T> core::ops::DerefMut for DataBuffer<T>
+    where
+        T: Verify,
+    {
+        fn deref_mut(&mut self) -> &mut Self::Target {
+            self.inner.as_mut()
+        }
+    }
+
+    impl<T> From<T> for DataBuffer<T>
+    where
+        T: Default + Verify,
+    {
+        fn from(value: T) -> Self {
+            let mut t = DataBuffer::<T>::default();
+            *t = value;
+            t
+        }
+    }
+
+    impl<T> Drop for DataBuffer<T> {
+        fn drop(&mut self) {
+            if self.used {
+                let ptr = Box::into_raw(unsafe { ManuallyDrop::take(&mut self.inner) });
+                // println!("drop DataBuffer val: 0x{:x}", ptr as usize);
+                libos!(buffer_dealloc(ptr as usize, Layout::new::<T>()));
+            }
+        }
+    }
+}
+
+#[cfg(feature = "file-based")]
+mod file_based_impl {
+    use alloc::{format, string::String};
+    use core::{borrow::Borrow, fmt::Write};
+    use ms_hostcall::Verify;
+    use serde::{Deserialize, Serialize};
+
+    use crate::fs::File;
+
+    #[derive(Debug)]
+    pub struct DataBuffer<T>
+    where
+        T: Serialize,
+    {
+        inner: T,
+        slot: String,
+        used: bool,
+    }
 
-            let inner = unsafe { Box::from_raw(raw_ptr as *mut T) };
+    impl<T> DataBuffer<T>
+    where
+        T: Verify + Serialize + for<'a> Deserialize<'a> + Default,
+    {
+        pub fn new() -> Self
+        where
+            T: Default,
+        {
+            Self::with_slot(String::new())
+        }
 
+        pub fn with_slot(slot: String) -> Self
+        where
+            T: Default,
+        {
             Self {
-                inner: ManuallyDrop::new(inner),
+                inner: T::default(),
+                slot,
                 used: false,
             }
-        })
+        }
+
+        pub fn from_buffer() -> Option<Self> {
+            Self::from_buffer_slot(String::new())
+        }
+
+        pub fn from_buffer_slot(slot: String) -> Option<Self>
+        where
+            T: Default,
+        {
+            use alloc::vec::Vec;
+
+            use crate::io::Read;
+
+            let mut content = if let Ok(file) = File::open(&format!("{}.imd", slot)) {
+                file
+            } else {
+                return None;
+            };
+
+            let mut result = Self {
+                inner: Default::default(),
+                slot: slot.clone(),
+                used: true,
+            };
+
+            let mut buffer = Vec::new();
+            content
+                .read_to_end(&mut buffer)
+                .expect("read imd file failed.");
+            result.inner =
+                serde_json::from_slice(&buffer).expect(&format!("deserialize {} failed.", &slot));
+
+            Some(result)
+        }
     }
-}
 
-impl<T> Default for DataBuffer<T>
-where
-    T: Default + Verify,
-{
-    fn default() -> DataBuffer<T> {
-        Self::new()
+    impl<T> Default for DataBuffer<T>
+    where
+        T: Default + Verify + Serialize + for<'a> Deserialize<'a>,
+    {
+        fn default() -> DataBuffer<T> {
+            Self::new()
+        }
     }
-}
 
-impl<T> core::ops::Deref for DataBuffer<T>
-where
-    T: Verify,
-{
-    type Target = T;
+    impl<T> core::ops::Deref for DataBuffer<T>
+    where
+        T: Verify + Serialize,
+    {
+        type Target = T;
 
-    fn deref(&self) -> &Self::Target {
-        self.inner.borrow()
+        fn deref(&self) -> &Self::Target {
+            self.inner.borrow()
+        }
     }
-}
 
-impl<T> core::ops::DerefMut for DataBuffer<T>
-where
-    T: Verify,
-{
-    fn deref_mut(&mut self) -> &mut Self::Target {
-        self.inner.as_mut()
+    impl<T> core::ops::DerefMut for DataBuffer<T>
+    where
+        T: Verify + Serialize,
+    {
+        fn deref_mut(&mut self) -> &mut Self::Target {
+            #[cfg(feature = "refer-based")]
+            {
+                self.inner.as_mut()
+            }
+            #[cfg(feature = "file-based")]
+            {
+                &mut self.inner
+            }
+        }
     }
-}
 
-impl<T> From<T> for DataBuffer<T>
-where
-    T: Default + Verify,
-{
-    fn from(value: T) -> Self {
-        let mut t = DataBuffer::<T>::default();
-        *t = value;
-        t
+    impl<T> From<T> for DataBuffer<T>
+    where
+        T: Default + Verify + Serialize + for<'a> Deserialize<'a>,
+    {
+        fn from(value: T) -> Self {
+            let mut t = DataBuffer::<T>::default();
+            *t = value;
+            t
+        }
     }
-}
 
-impl<T> Drop for DataBuffer<T> {
-    fn drop(&mut self) {
-        if self.used {
-            let ptr = Box::into_raw(unsafe { ManuallyDrop::take(&mut self.inner) });
-            // println!("drop DataBuffer val: 0x{:x}", ptr as usize);
-            libos!(buffer_dealloc(ptr as usize, Layout::new::<T>()));
+    impl<T> Drop for DataBuffer<T>
+    where
+        T: Serialize,
+    {
+        fn drop(&mut self) {
+            if !self.used {
+                let mut content =
+                    File::create(&format!("{}.imd", &self.slot)).expect("create imd file failed.");
+                let data_str = serde_json::to_string(&self.inner).expect("serialize failed.");
+
+                content.write_str(&data_str).expect("write failed.");
+            }
         }
     }
 }
+
+#[cfg(not(feature = "file-based"))]
+pub use refer_based_impl::*;
+
+#[cfg(feature = "file-based")]
+pub use file_based_impl::*;
diff --git a/scripts/build_all_common.sh b/scripts/build_all_common.sh
index edad3ca8..4e691079 100755
--- a/scripts/build_all_common.sh
+++ b/scripts/build_all_common.sh
@@ -2,4 +2,10 @@
 
 mkdir -p target/debug/ && mkdir -p target/release/
 
-ls common_service | xargs -n 1 printf "./scripts/build_common.sh %s $1\n" | bash
\ No newline at end of file
+# ls common_service | xargs -n 1 printf "./scripts/build_common.sh %s $1\n" | bash
+
+# shellcheck disable=SC2045
+for module in $(ls common_service); do
+    echo "build $module."
+    ./scripts/build_common.sh "$module" "$1"
+done
diff --git a/scripts/gen_data.py b/scripts/gen_data.py
index 563304ad..a846e406 100755
--- a/scripts/gen_data.py
+++ b/scripts/gen_data.py
@@ -38,4 +38,4 @@ def gen_parallel_sort(file_num: int, total_size: int):
             f.write('1')
 
 if __name__ == "__main__":
-    gen_parallel_sort(1, 50 * 1024 * 1024)
+    gen_parallel_sort(3, 25 * 1024 * 1024)
diff --git a/user/array_sum/Cargo.lock b/user/array_sum/Cargo.lock
index 2e73f5fb..233d39e5 100644
--- a/user/array_sum/Cargo.lock
+++ b/user/array_sum/Cargo.lock
@@ -73,6 +73,12 @@ dependencies = [
  "stable_deref_trait",
 ]
 
+[[package]]
+name = "itoa"
+version = "1.0.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d75a2a4b1b190afb6f5425f10f6a8f959d2ea0b9c2b1d79553551850539e4674"
+
 [[package]]
 name = "linked_list_allocator"
 version = "0.10.5"
@@ -92,6 +98,12 @@ dependencies = [
  "scopeguard",
 ]
 
+[[package]]
+name = "memchr"
+version = "2.7.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "78ca9ab1a0babb1e7d5695e3530886289c18cf2f87ec19a575a0abdce112e3a3"
+
 [[package]]
 name = "ms_hostcall"
 version = "0.1.0"
@@ -110,6 +122,8 @@ dependencies = [
  "linked_list_allocator",
  "ms_hostcall",
  "ms_std_proc_macro",
+ "serde",
+ "serde_json",
  "spin",
  "thiserror-no-std",
 ]
@@ -120,23 +134,23 @@ version = "0.1.0"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 1.0.109",
 ]
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.70"
+version = "1.0.93"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "39278fbbf5fb4f646ce651690877f89d1c5811a3d4acb27700c1cb3cdb78fd3b"
+checksum = "60946a68e5f9d28b0dc1c21bb8a97ee7d018a8b322fa57838ba31cc878e22d99"
 dependencies = [
  "unicode-ident",
 ]
 
 [[package]]
 name = "quote"
-version = "1.0.33"
+version = "1.0.38"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5267fca4496028628a95160fc423a33e8b2e6af8a5302579e322e4b520293cae"
+checksum = "0e4dccaaaf89514f546c693ddc140f729f958c247918a13380cccc6078391acc"
 dependencies = [
  "proc-macro2",
 ]
@@ -150,6 +164,12 @@ dependencies = [
  "semver",
 ]
 
+[[package]]
+name = "ryu"
+version = "1.0.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f3cb5ba0dc43242ce17de99c180e96db90b235b8a9fdc9543c96d2209116bd9f"
+
 [[package]]
 name = "scopeguard"
 version = "1.2.0"
@@ -162,6 +182,38 @@ version = "1.0.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "836fa6a3e1e547f9a2c4040802ec865b5d85f4014efe00555d7090a3dcaa1090"
 
+[[package]]
+name = "serde"
+version = "1.0.217"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "02fc4265df13d6fa1d00ecff087228cc0a2b5f3c0e87e258d8b94a156e984c70"
+dependencies = [
+ "serde_derive",
+]
+
+[[package]]
+name = "serde_derive"
+version = "1.0.217"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5a9bf7cf98d04a2b28aead066b7496853d4779c9cc183c440dbac457641e19a0"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.96",
+]
+
+[[package]]
+name = "serde_json"
+version = "1.0.135"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2b0d7ba2887406110130a978386c4e1befb98c674b4fba677954e4db976630d9"
+dependencies = [
+ "itoa",
+ "memchr",
+ "ryu",
+ "serde",
+]
+
 [[package]]
 name = "spin"
 version = "0.9.8"
@@ -199,9 +251,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.39"
+version = "2.0.96"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "23e78b90f2fcf45d3e842032ce32e3f2d1545ba6636271dcbf24fa306d87be7a"
+checksum = "d5d0adab1ae378d7f53bdebc67a39f1f151407ef230f0ce2883572f5d8985c80"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/user/checker/Cargo.lock b/user/checker/Cargo.lock
index 649730e9..f1f84cd2 100644
--- a/user/checker/Cargo.lock
+++ b/user/checker/Cargo.lock
@@ -79,6 +79,12 @@ dependencies = [
  "stable_deref_trait",
 ]
 
+[[package]]
+name = "itoa"
+version = "1.0.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d75a2a4b1b190afb6f5425f10f6a8f959d2ea0b9c2b1d79553551850539e4674"
+
 [[package]]
 name = "libc"
 version = "0.2.150"
@@ -104,6 +110,12 @@ dependencies = [
  "scopeguard",
 ]
 
+[[package]]
+name = "memchr"
+version = "2.7.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "78ca9ab1a0babb1e7d5695e3530886289c18cf2f87ec19a575a0abdce112e3a3"
+
 [[package]]
 name = "ms_hostcall"
 version = "0.1.0"
@@ -122,6 +134,8 @@ dependencies = [
  "linked_list_allocator",
  "ms_hostcall",
  "ms_std_proc_macro",
+ "serde",
+ "serde_json",
  "spin",
  "thiserror-no-std",
  "unwinding",
@@ -133,23 +147,23 @@ version = "0.1.0"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 1.0.109",
 ]
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.70"
+version = "1.0.93"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "39278fbbf5fb4f646ce651690877f89d1c5811a3d4acb27700c1cb3cdb78fd3b"
+checksum = "60946a68e5f9d28b0dc1c21bb8a97ee7d018a8b322fa57838ba31cc878e22d99"
 dependencies = [
  "unicode-ident",
 ]
 
 [[package]]
 name = "quote"
-version = "1.0.33"
+version = "1.0.38"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5267fca4496028628a95160fc423a33e8b2e6af8a5302579e322e4b520293cae"
+checksum = "0e4dccaaaf89514f546c693ddc140f729f958c247918a13380cccc6078391acc"
 dependencies = [
  "proc-macro2",
 ]
@@ -163,6 +177,12 @@ dependencies = [
  "semver",
 ]
 
+[[package]]
+name = "ryu"
+version = "1.0.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f3cb5ba0dc43242ce17de99c180e96db90b235b8a9fdc9543c96d2209116bd9f"
+
 [[package]]
 name = "scopeguard"
 version = "1.2.0"
@@ -175,6 +195,38 @@ version = "1.0.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "836fa6a3e1e547f9a2c4040802ec865b5d85f4014efe00555d7090a3dcaa1090"
 
+[[package]]
+name = "serde"
+version = "1.0.217"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "02fc4265df13d6fa1d00ecff087228cc0a2b5f3c0e87e258d8b94a156e984c70"
+dependencies = [
+ "serde_derive",
+]
+
+[[package]]
+name = "serde_derive"
+version = "1.0.217"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5a9bf7cf98d04a2b28aead066b7496853d4779c9cc183c440dbac457641e19a0"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.96",
+]
+
+[[package]]
+name = "serde_json"
+version = "1.0.135"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2b0d7ba2887406110130a978386c4e1befb98c674b4fba677954e4db976630d9"
+dependencies = [
+ "itoa",
+ "memchr",
+ "ryu",
+ "serde",
+]
+
 [[package]]
 name = "spin"
 version = "0.9.8"
@@ -212,9 +264,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.39"
+version = "2.0.96"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "23e78b90f2fcf45d3e842032ce32e3f2d1545ba6636271dcbf24fa306d87be7a"
+checksum = "d5d0adab1ae378d7f53bdebc67a39f1f151407ef230f0ce2883572f5d8985c80"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/user/file_reader/Cargo.lock b/user/file_reader/Cargo.lock
index 166bb459..dcc163fe 100644
--- a/user/file_reader/Cargo.lock
+++ b/user/file_reader/Cargo.lock
@@ -53,6 +53,7 @@ dependencies = [
  "ms_hostcall",
  "ms_std",
  "ms_std_proc_macro",
+ "serde",
 ]
 
 [[package]]
@@ -74,6 +75,12 @@ dependencies = [
  "stable_deref_trait",
 ]
 
+[[package]]
+name = "itoa"
+version = "1.0.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d75a2a4b1b190afb6f5425f10f6a8f959d2ea0b9c2b1d79553551850539e4674"
+
 [[package]]
 name = "linked_list_allocator"
 version = "0.10.5"
@@ -93,6 +100,12 @@ dependencies = [
  "scopeguard",
 ]
 
+[[package]]
+name = "memchr"
+version = "2.7.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "78ca9ab1a0babb1e7d5695e3530886289c18cf2f87ec19a575a0abdce112e3a3"
+
 [[package]]
 name = "ms_hostcall"
 version = "0.1.0"
@@ -111,6 +124,8 @@ dependencies = [
  "linked_list_allocator",
  "ms_hostcall",
  "ms_std_proc_macro",
+ "serde",
+ "serde_json",
  "spin",
  "thiserror-no-std",
 ]
@@ -121,23 +136,23 @@ version = "0.1.0"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 1.0.109",
 ]
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.70"
+version = "1.0.93"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "39278fbbf5fb4f646ce651690877f89d1c5811a3d4acb27700c1cb3cdb78fd3b"
+checksum = "60946a68e5f9d28b0dc1c21bb8a97ee7d018a8b322fa57838ba31cc878e22d99"
 dependencies = [
  "unicode-ident",
 ]
 
 [[package]]
 name = "quote"
-version = "1.0.33"
+version = "1.0.38"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5267fca4496028628a95160fc423a33e8b2e6af8a5302579e322e4b520293cae"
+checksum = "0e4dccaaaf89514f546c693ddc140f729f958c247918a13380cccc6078391acc"
 dependencies = [
  "proc-macro2",
 ]
@@ -151,6 +166,12 @@ dependencies = [
  "semver",
 ]
 
+[[package]]
+name = "ryu"
+version = "1.0.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f3cb5ba0dc43242ce17de99c180e96db90b235b8a9fdc9543c96d2209116bd9f"
+
 [[package]]
 name = "scopeguard"
 version = "1.2.0"
@@ -163,6 +184,38 @@ version = "1.0.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "836fa6a3e1e547f9a2c4040802ec865b5d85f4014efe00555d7090a3dcaa1090"
 
+[[package]]
+name = "serde"
+version = "1.0.217"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "02fc4265df13d6fa1d00ecff087228cc0a2b5f3c0e87e258d8b94a156e984c70"
+dependencies = [
+ "serde_derive",
+]
+
+[[package]]
+name = "serde_derive"
+version = "1.0.217"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5a9bf7cf98d04a2b28aead066b7496853d4779c9cc183c440dbac457641e19a0"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.96",
+]
+
+[[package]]
+name = "serde_json"
+version = "1.0.135"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2b0d7ba2887406110130a978386c4e1befb98c674b4fba677954e4db976630d9"
+dependencies = [
+ "itoa",
+ "memchr",
+ "ryu",
+ "serde",
+]
+
 [[package]]
 name = "spin"
 version = "0.9.8"
@@ -200,9 +253,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.39"
+version = "2.0.96"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "23e78b90f2fcf45d3e842032ce32e3f2d1545ba6636271dcbf24fa306d87be7a"
+checksum = "d5d0adab1ae378d7f53bdebc67a39f1f151407ef230f0ce2883572f5d8985c80"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/user/file_reader/Cargo.toml b/user/file_reader/Cargo.toml
index 9f2d6239..e16930ba 100644
--- a/user/file_reader/Cargo.toml
+++ b/user/file_reader/Cargo.toml
@@ -13,6 +13,7 @@ ms_std = { path = "../../ms_std", features = ["alloc_def", "panic_def"] }
 ms_hostcall = { path = "../../ms_hostcall" }
 ms_std_proc_macro = { path = "../../ms_std_proc_macro" }
 heapless = "0.8.0"
+serde = { version = "1.0.217", default-features = false, features = ["derive"] }
 
 [features]
 mpk = ["ms_std/mpk"]
diff --git a/user/file_reader/src/lib.rs b/user/file_reader/src/lib.rs
index 5fd63f06..9875fb45 100644
--- a/user/file_reader/src/lib.rs
+++ b/user/file_reader/src/lib.rs
@@ -10,9 +10,10 @@ use ms_std::{
     time::{SystemTime, UNIX_EPOCH},
 };
 use ms_std_proc_macro::FaasData;
+use serde::{Deserialize, Serialize};
 // use ms_std_proc_macro::FaasData;
 
-#[derive(Default, FaasData)]
+#[derive(Default, FaasData, Serialize, Deserialize)]
 struct VecArg {
     #[cfg(feature = "pkey_per_func")]
     content: heapless::String<{ 110 * 1024 * 1024 }>,
diff --git a/user/func_a/Cargo.lock b/user/func_a/Cargo.lock
index 13ecb434..378d0b9a 100644
--- a/user/func_a/Cargo.lock
+++ b/user/func_a/Cargo.lock
@@ -52,6 +52,7 @@ dependencies = [
  "ms_hostcall",
  "ms_std",
  "ms_std_proc_macro",
+ "serde",
 ]
 
 [[package]]
@@ -73,6 +74,12 @@ dependencies = [
  "stable_deref_trait",
 ]
 
+[[package]]
+name = "itoa"
+version = "1.0.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d75a2a4b1b190afb6f5425f10f6a8f959d2ea0b9c2b1d79553551850539e4674"
+
 [[package]]
 name = "linked_list_allocator"
 version = "0.10.5"
@@ -92,6 +99,12 @@ dependencies = [
  "scopeguard",
 ]
 
+[[package]]
+name = "memchr"
+version = "2.7.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "78ca9ab1a0babb1e7d5695e3530886289c18cf2f87ec19a575a0abdce112e3a3"
+
 [[package]]
 name = "ms_hostcall"
 version = "0.1.0"
@@ -110,6 +123,8 @@ dependencies = [
  "linked_list_allocator",
  "ms_hostcall",
  "ms_std_proc_macro",
+ "serde",
+ "serde_json",
  "spin",
  "thiserror-no-std",
 ]
@@ -120,23 +135,23 @@ version = "0.1.0"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 1.0.109",
 ]
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.70"
+version = "1.0.93"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "39278fbbf5fb4f646ce651690877f89d1c5811a3d4acb27700c1cb3cdb78fd3b"
+checksum = "60946a68e5f9d28b0dc1c21bb8a97ee7d018a8b322fa57838ba31cc878e22d99"
 dependencies = [
  "unicode-ident",
 ]
 
 [[package]]
 name = "quote"
-version = "1.0.33"
+version = "1.0.38"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5267fca4496028628a95160fc423a33e8b2e6af8a5302579e322e4b520293cae"
+checksum = "0e4dccaaaf89514f546c693ddc140f729f958c247918a13380cccc6078391acc"
 dependencies = [
  "proc-macro2",
 ]
@@ -150,6 +165,12 @@ dependencies = [
  "semver",
 ]
 
+[[package]]
+name = "ryu"
+version = "1.0.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f3cb5ba0dc43242ce17de99c180e96db90b235b8a9fdc9543c96d2209116bd9f"
+
 [[package]]
 name = "scopeguard"
 version = "1.2.0"
@@ -162,6 +183,38 @@ version = "1.0.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "836fa6a3e1e547f9a2c4040802ec865b5d85f4014efe00555d7090a3dcaa1090"
 
+[[package]]
+name = "serde"
+version = "1.0.217"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "02fc4265df13d6fa1d00ecff087228cc0a2b5f3c0e87e258d8b94a156e984c70"
+dependencies = [
+ "serde_derive",
+]
+
+[[package]]
+name = "serde_derive"
+version = "1.0.217"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5a9bf7cf98d04a2b28aead066b7496853d4779c9cc183c440dbac457641e19a0"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.96",
+]
+
+[[package]]
+name = "serde_json"
+version = "1.0.135"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2b0d7ba2887406110130a978386c4e1befb98c674b4fba677954e4db976630d9"
+dependencies = [
+ "itoa",
+ "memchr",
+ "ryu",
+ "serde",
+]
+
 [[package]]
 name = "spin"
 version = "0.9.8"
@@ -199,9 +252,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.39"
+version = "2.0.96"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "23e78b90f2fcf45d3e842032ce32e3f2d1545ba6636271dcbf24fa306d87be7a"
+checksum = "d5d0adab1ae378d7f53bdebc67a39f1f151407ef230f0ce2883572f5d8985c80"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/user/func_a/Cargo.toml b/user/func_a/Cargo.toml
index dceb29fa..6777705a 100644
--- a/user/func_a/Cargo.toml
+++ b/user/func_a/Cargo.toml
@@ -12,9 +12,11 @@ crate-type = ["dylib"]
 ms_std = { path = "../../ms_std", features = ["alloc_def", "panic_def"] }
 ms_hostcall = { path = "../../ms_hostcall" }
 ms_std_proc_macro = { path = "../../ms_std_proc_macro" }
+serde = { version = "1.0.217", default-features = false, features = ["derive"] }
 
 
 [features]
 mpk = ["ms_std/mpk"]
 pkey_per_func = ["mpk"]
-default = []
\ No newline at end of file
+
+default = []
diff --git a/user/func_a/src/lib.rs b/user/func_a/src/lib.rs
index 329f21c2..34a291eb 100644
--- a/user/func_a/src/lib.rs
+++ b/user/func_a/src/lib.rs
@@ -2,7 +2,7 @@
 
 extern crate alloc;
 
-use alloc::borrow::ToOwned;
+use alloc::{borrow::ToOwned, vec::Vec};
 use ms_std::{
     agent::{DataBuffer, FaaSFuncResult as Result},
     println,
@@ -13,15 +13,15 @@ use ms_std_proc_macro::FaasData;
 // const DATA_SIZE: usize = 1024 * 1024 * 256 / 8;
 const DATA_SIZE: usize = 1024 * 1024 * 16 / 8;
 
-#[derive(FaasData)]
+#[derive(FaasData, serde::Serialize, serde::Deserialize)]
 struct VecArg {
-    data: [u64; DATA_SIZE],
+    data: Vec<u64>,
 }
 
 impl Default for VecArg {
     fn default() -> Self {
         Self {
-            data: [0; DATA_SIZE],
+            data: Vec::with_capacity(DATA_SIZE),
         }
     }
 }
@@ -35,17 +35,17 @@ pub fn main() -> Result<()> {
         *val = (idx % (u64::MAX - 1) as usize) as u64
     }
 
-    let register_start = SystemTime::now().duration_since(UNIX_EPOCH).as_nanos();
-    let result = DataBuffer::<VecArg>::from_buffer_slot("Conference".to_owned());
+    // let register_start = SystemTime::now().duration_since(UNIX_EPOCH).as_nanos();
+    // let result = DataBuffer::<VecArg>::from_buffer_slot("Conference".to_owned());
 
-    if let Some(buffer) = result {
-        for i in 0..buffer.data.len() {
-            let _ = unsafe { core::ptr::read_volatile((&buffer.data[i]) as *const u64) };
-        }
-    }
-    let access_end2 = SystemTime::now().duration_since(UNIX_EPOCH).as_nanos();
+    // if let Some(buffer) = result {
+    //     for i in 0..buffer.data.len() {
+    //         let _ = unsafe { core::ptr::read_volatile((&buffer.data[i]) as *const u64) };
+    //     }
+    // }
+    // let access_end2 = SystemTime::now().duration_since(UNIX_EPOCH).as_nanos();
 
-    println!("phase34_dur={}", access_end2 - register_start);
+    // println!("phase34_dur={}", access_end2 - register_start);
 
     Ok(().into())
 }
diff --git a/user/func_b/Cargo.lock b/user/func_b/Cargo.lock
index 18829295..0af4b19e 100644
--- a/user/func_b/Cargo.lock
+++ b/user/func_b/Cargo.lock
@@ -52,6 +52,7 @@ dependencies = [
  "ms_hostcall",
  "ms_std",
  "ms_std_proc_macro",
+ "serde",
 ]
 
 [[package]]
@@ -73,6 +74,12 @@ dependencies = [
  "stable_deref_trait",
 ]
 
+[[package]]
+name = "itoa"
+version = "1.0.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d75a2a4b1b190afb6f5425f10f6a8f959d2ea0b9c2b1d79553551850539e4674"
+
 [[package]]
 name = "linked_list_allocator"
 version = "0.10.5"
@@ -92,6 +99,12 @@ dependencies = [
  "scopeguard",
 ]
 
+[[package]]
+name = "memchr"
+version = "2.7.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "78ca9ab1a0babb1e7d5695e3530886289c18cf2f87ec19a575a0abdce112e3a3"
+
 [[package]]
 name = "ms_hostcall"
 version = "0.1.0"
@@ -110,6 +123,8 @@ dependencies = [
  "linked_list_allocator",
  "ms_hostcall",
  "ms_std_proc_macro",
+ "serde",
+ "serde_json",
  "spin",
  "thiserror-no-std",
 ]
@@ -120,23 +135,23 @@ version = "0.1.0"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 1.0.109",
 ]
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.70"
+version = "1.0.93"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "39278fbbf5fb4f646ce651690877f89d1c5811a3d4acb27700c1cb3cdb78fd3b"
+checksum = "60946a68e5f9d28b0dc1c21bb8a97ee7d018a8b322fa57838ba31cc878e22d99"
 dependencies = [
  "unicode-ident",
 ]
 
 [[package]]
 name = "quote"
-version = "1.0.33"
+version = "1.0.38"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5267fca4496028628a95160fc423a33e8b2e6af8a5302579e322e4b520293cae"
+checksum = "0e4dccaaaf89514f546c693ddc140f729f958c247918a13380cccc6078391acc"
 dependencies = [
  "proc-macro2",
 ]
@@ -150,6 +165,12 @@ dependencies = [
  "semver",
 ]
 
+[[package]]
+name = "ryu"
+version = "1.0.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f3cb5ba0dc43242ce17de99c180e96db90b235b8a9fdc9543c96d2209116bd9f"
+
 [[package]]
 name = "scopeguard"
 version = "1.2.0"
@@ -162,6 +183,38 @@ version = "1.0.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "836fa6a3e1e547f9a2c4040802ec865b5d85f4014efe00555d7090a3dcaa1090"
 
+[[package]]
+name = "serde"
+version = "1.0.217"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "02fc4265df13d6fa1d00ecff087228cc0a2b5f3c0e87e258d8b94a156e984c70"
+dependencies = [
+ "serde_derive",
+]
+
+[[package]]
+name = "serde_derive"
+version = "1.0.217"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5a9bf7cf98d04a2b28aead066b7496853d4779c9cc183c440dbac457641e19a0"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.96",
+]
+
+[[package]]
+name = "serde_json"
+version = "1.0.135"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2b0d7ba2887406110130a978386c4e1befb98c674b4fba677954e4db976630d9"
+dependencies = [
+ "itoa",
+ "memchr",
+ "ryu",
+ "serde",
+]
+
 [[package]]
 name = "spin"
 version = "0.9.8"
@@ -199,9 +252,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.39"
+version = "2.0.96"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "23e78b90f2fcf45d3e842032ce32e3f2d1545ba6636271dcbf24fa306d87be7a"
+checksum = "d5d0adab1ae378d7f53bdebc67a39f1f151407ef230f0ce2883572f5d8985c80"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/user/func_b/Cargo.toml b/user/func_b/Cargo.toml
index f5dd3a30..2db2e2ce 100644
--- a/user/func_b/Cargo.toml
+++ b/user/func_b/Cargo.toml
@@ -12,8 +12,9 @@ crate-type = ["dylib"]
 ms_std = { path = "../../ms_std", features = ["alloc_def", "panic_def"] }
 ms_hostcall = { path = "../../ms_hostcall" }
 ms_std_proc_macro = { path = "../../ms_std_proc_macro" }
+serde = { version = "1.0.217", default-features = false, features = ["derive"] }
 
 [features]
 mpk = ["ms_std/mpk"]
 pkey_per_func = ["mpk"]
-default = []
\ No newline at end of file
+default = []
diff --git a/user/func_b/src/lib.rs b/user/func_b/src/lib.rs
index 9fb73add..f6646b9e 100644
--- a/user/func_b/src/lib.rs
+++ b/user/func_b/src/lib.rs
@@ -2,7 +2,7 @@
 
 extern crate alloc;
 
-use alloc::borrow::ToOwned;
+use alloc::{borrow::ToOwned, vec::Vec};
 use ms_std::{
     agent::{DataBuffer, FaaSFuncResult as Result},
     println,
@@ -12,15 +12,15 @@ use ms_std_proc_macro::FaasData;
 
 const DATA_SIZE: usize = 1024 * 1024 * 16 / 8;
 
-#[derive(FaasData)]
-pub struct MyComplexData {
-    data: [u64; DATA_SIZE],
+#[derive(FaasData, serde::Serialize, serde::Deserialize)]
+struct MyComplexData {
+    data: Vec<u64>,
 }
 
 impl Default for MyComplexData {
     fn default() -> Self {
         Self {
-            data: [0; DATA_SIZE],
+            data: Vec::with_capacity(DATA_SIZE),
         }
     }
 }
diff --git a/user/hello_world/Cargo.lock b/user/hello_world/Cargo.lock
index 719a4934..93f90495 100644
--- a/user/hello_world/Cargo.lock
+++ b/user/hello_world/Cargo.lock
@@ -73,6 +73,12 @@ dependencies = [
  "ms_std",
 ]
 
+[[package]]
+name = "itoa"
+version = "1.0.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d75a2a4b1b190afb6f5425f10f6a8f959d2ea0b9c2b1d79553551850539e4674"
+
 [[package]]
 name = "linked_list_allocator"
 version = "0.10.5"
@@ -92,6 +98,12 @@ dependencies = [
  "scopeguard",
 ]
 
+[[package]]
+name = "memchr"
+version = "2.7.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "78ca9ab1a0babb1e7d5695e3530886289c18cf2f87ec19a575a0abdce112e3a3"
+
 [[package]]
 name = "ms_hostcall"
 version = "0.1.0"
@@ -110,6 +122,8 @@ dependencies = [
  "linked_list_allocator",
  "ms_hostcall",
  "ms_std_proc_macro",
+ "serde",
+ "serde_json",
  "spin",
  "thiserror-no-std",
 ]
@@ -120,23 +134,23 @@ version = "0.1.0"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 1.0.109",
 ]
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.70"
+version = "1.0.93"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "39278fbbf5fb4f646ce651690877f89d1c5811a3d4acb27700c1cb3cdb78fd3b"
+checksum = "60946a68e5f9d28b0dc1c21bb8a97ee7d018a8b322fa57838ba31cc878e22d99"
 dependencies = [
  "unicode-ident",
 ]
 
 [[package]]
 name = "quote"
-version = "1.0.33"
+version = "1.0.38"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5267fca4496028628a95160fc423a33e8b2e6af8a5302579e322e4b520293cae"
+checksum = "0e4dccaaaf89514f546c693ddc140f729f958c247918a13380cccc6078391acc"
 dependencies = [
  "proc-macro2",
 ]
@@ -150,6 +164,12 @@ dependencies = [
  "semver",
 ]
 
+[[package]]
+name = "ryu"
+version = "1.0.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f3cb5ba0dc43242ce17de99c180e96db90b235b8a9fdc9543c96d2209116bd9f"
+
 [[package]]
 name = "scopeguard"
 version = "1.2.0"
@@ -162,6 +182,38 @@ version = "1.0.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "836fa6a3e1e547f9a2c4040802ec865b5d85f4014efe00555d7090a3dcaa1090"
 
+[[package]]
+name = "serde"
+version = "1.0.217"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "02fc4265df13d6fa1d00ecff087228cc0a2b5f3c0e87e258d8b94a156e984c70"
+dependencies = [
+ "serde_derive",
+]
+
+[[package]]
+name = "serde_derive"
+version = "1.0.217"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5a9bf7cf98d04a2b28aead066b7496853d4779c9cc183c440dbac457641e19a0"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.96",
+]
+
+[[package]]
+name = "serde_json"
+version = "1.0.135"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2b0d7ba2887406110130a978386c4e1befb98c674b4fba677954e4db976630d9"
+dependencies = [
+ "itoa",
+ "memchr",
+ "ryu",
+ "serde",
+]
+
 [[package]]
 name = "spin"
 version = "0.9.8"
@@ -199,9 +251,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.39"
+version = "2.0.96"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "23e78b90f2fcf45d3e842032ce32e3f2d1545ba6636271dcbf24fa306d87be7a"
+checksum = "d5d0adab1ae378d7f53bdebc67a39f1f151407ef230f0ce2883572f5d8985c80"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/user/mapper/Cargo.lock b/user/mapper/Cargo.lock
index dbb374cc..d9288ac8 100644
--- a/user/mapper/Cargo.lock
+++ b/user/mapper/Cargo.lock
@@ -79,6 +79,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "290f1a1d9242c78d09ce40a5e87e7554ee637af1351968159f4952f028f75604"
 dependencies = [
  "ahash",
+ "serde",
 ]
 
 [[package]]
@@ -91,6 +92,12 @@ dependencies = [
  "stable_deref_trait",
 ]
 
+[[package]]
+name = "itoa"
+version = "1.0.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d75a2a4b1b190afb6f5425f10f6a8f959d2ea0b9c2b1d79553551850539e4674"
+
 [[package]]
 name = "libc"
 version = "0.2.158"
@@ -125,8 +132,15 @@ dependencies = [
  "ms_hostcall",
  "ms_std",
  "ms_std_proc_macro",
+ "serde",
 ]
 
+[[package]]
+name = "memchr"
+version = "2.7.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "78ca9ab1a0babb1e7d5695e3530886289c18cf2f87ec19a575a0abdce112e3a3"
+
 [[package]]
 name = "ms_hostcall"
 version = "0.1.0"
@@ -145,6 +159,8 @@ dependencies = [
  "linked_list_allocator",
  "ms_hostcall",
  "ms_std_proc_macro",
+ "serde",
+ "serde_json",
  "spin",
  "thiserror-no-std",
  "unwinding",
@@ -156,7 +172,7 @@ version = "0.1.0"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 1.0.109",
 ]
 
 [[package]]
@@ -167,18 +183,18 @@ checksum = "dd8b5dd2ae5ed71462c540258bedcb51965123ad7e7ccf4b9a8cafaa4a63576d"
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.70"
+version = "1.0.93"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "39278fbbf5fb4f646ce651690877f89d1c5811a3d4acb27700c1cb3cdb78fd3b"
+checksum = "60946a68e5f9d28b0dc1c21bb8a97ee7d018a8b322fa57838ba31cc878e22d99"
 dependencies = [
  "unicode-ident",
 ]
 
 [[package]]
 name = "quote"
-version = "1.0.33"
+version = "1.0.38"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5267fca4496028628a95160fc423a33e8b2e6af8a5302579e322e4b520293cae"
+checksum = "0e4dccaaaf89514f546c693ddc140f729f958c247918a13380cccc6078391acc"
 dependencies = [
  "proc-macro2",
 ]
@@ -192,6 +208,12 @@ dependencies = [
  "semver",
 ]
 
+[[package]]
+name = "ryu"
+version = "1.0.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f3cb5ba0dc43242ce17de99c180e96db90b235b8a9fdc9543c96d2209116bd9f"
+
 [[package]]
 name = "scopeguard"
 version = "1.2.0"
@@ -204,6 +226,38 @@ version = "1.0.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "836fa6a3e1e547f9a2c4040802ec865b5d85f4014efe00555d7090a3dcaa1090"
 
+[[package]]
+name = "serde"
+version = "1.0.217"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "02fc4265df13d6fa1d00ecff087228cc0a2b5f3c0e87e258d8b94a156e984c70"
+dependencies = [
+ "serde_derive",
+]
+
+[[package]]
+name = "serde_derive"
+version = "1.0.217"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5a9bf7cf98d04a2b28aead066b7496853d4779c9cc183c440dbac457641e19a0"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.96",
+]
+
+[[package]]
+name = "serde_json"
+version = "1.0.135"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2b0d7ba2887406110130a978386c4e1befb98c674b4fba677954e4db976630d9"
+dependencies = [
+ "itoa",
+ "memchr",
+ "ryu",
+ "serde",
+]
+
 [[package]]
 name = "spin"
 version = "0.9.8"
@@ -241,9 +295,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.39"
+version = "2.0.96"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "23e78b90f2fcf45d3e842032ce32e3f2d1545ba6636271dcbf24fa306d87be7a"
+checksum = "d5d0adab1ae378d7f53bdebc67a39f1f151407ef230f0ce2883572f5d8985c80"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -309,5 +363,5 @@ checksum = "fa4f8080344d4671fb4e831a13ad1e68092748387dfc4f55e356242fae12ce3e"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 2.0.96",
 ]
diff --git a/user/mapper/Cargo.toml b/user/mapper/Cargo.toml
index 05091d71..74ab023b 100644
--- a/user/mapper/Cargo.toml
+++ b/user/mapper/Cargo.toml
@@ -15,8 +15,10 @@ ms_std_proc_macro = { path = "../../ms_std_proc_macro" }
 
 hashbrown = { version = "=0.14.3", default-features = false, features = [
     "ahash",
+    "serde",
 ] }
 heapless = { version = "0.8.0", default-features = false }
+serde = { version = "1.0.217", default-features = false, features = ["derive"] }
 
 [features]
 mpk = ["ms_std/mpk"]
diff --git a/user/mapper/src/lib.rs b/user/mapper/src/lib.rs
index 77a79dfc..05555275 100644
--- a/user/mapper/src/lib.rs
+++ b/user/mapper/src/lib.rs
@@ -23,6 +23,7 @@ use ms_std::{
     time::{SystemTime, UNIX_EPOCH},
 };
 use ms_std_proc_macro::FaasData;
+use serde::{Deserialize, Serialize};
 
 extern crate alloc;
 
@@ -31,7 +32,7 @@ extern crate alloc;
 //     content: String,
 // }
 
-#[derive(FaasData)]
+#[derive(FaasData, Serialize, Deserialize)]
 struct Mapper2Reducer {
     #[cfg(feature = "pkey_per_func")]
     shuffle: heapless::FnvIndexMap<heapless::String<32>, u32, 1024>,
diff --git a/user/merger/Cargo.lock b/user/merger/Cargo.lock
index 6b92e5b6..2e946e5a 100644
--- a/user/merger/Cargo.lock
+++ b/user/merger/Cargo.lock
@@ -70,6 +70,12 @@ dependencies = [
  "stable_deref_trait",
 ]
 
+[[package]]
+name = "itoa"
+version = "1.0.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d75a2a4b1b190afb6f5425f10f6a8f959d2ea0b9c2b1d79553551850539e4674"
+
 [[package]]
 name = "libc"
 version = "0.2.150"
@@ -95,6 +101,12 @@ dependencies = [
  "scopeguard",
 ]
 
+[[package]]
+name = "memchr"
+version = "2.7.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "78ca9ab1a0babb1e7d5695e3530886289c18cf2f87ec19a575a0abdce112e3a3"
+
 [[package]]
 name = "merger"
 version = "0.1.0"
@@ -103,6 +115,7 @@ dependencies = [
  "ms_hostcall",
  "ms_std",
  "ms_std_proc_macro",
+ "serde",
 ]
 
 [[package]]
@@ -123,6 +136,8 @@ dependencies = [
  "linked_list_allocator",
  "ms_hostcall",
  "ms_std_proc_macro",
+ "serde",
+ "serde_json",
  "spin",
  "thiserror-no-std",
  "unwinding",
@@ -134,23 +149,23 @@ version = "0.1.0"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 1.0.109",
 ]
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.70"
+version = "1.0.93"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "39278fbbf5fb4f646ce651690877f89d1c5811a3d4acb27700c1cb3cdb78fd3b"
+checksum = "60946a68e5f9d28b0dc1c21bb8a97ee7d018a8b322fa57838ba31cc878e22d99"
 dependencies = [
  "unicode-ident",
 ]
 
 [[package]]
 name = "quote"
-version = "1.0.33"
+version = "1.0.38"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5267fca4496028628a95160fc423a33e8b2e6af8a5302579e322e4b520293cae"
+checksum = "0e4dccaaaf89514f546c693ddc140f729f958c247918a13380cccc6078391acc"
 dependencies = [
  "proc-macro2",
 ]
@@ -164,6 +179,12 @@ dependencies = [
  "semver",
 ]
 
+[[package]]
+name = "ryu"
+version = "1.0.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f3cb5ba0dc43242ce17de99c180e96db90b235b8a9fdc9543c96d2209116bd9f"
+
 [[package]]
 name = "scopeguard"
 version = "1.2.0"
@@ -176,6 +197,38 @@ version = "1.0.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "836fa6a3e1e547f9a2c4040802ec865b5d85f4014efe00555d7090a3dcaa1090"
 
+[[package]]
+name = "serde"
+version = "1.0.217"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "02fc4265df13d6fa1d00ecff087228cc0a2b5f3c0e87e258d8b94a156e984c70"
+dependencies = [
+ "serde_derive",
+]
+
+[[package]]
+name = "serde_derive"
+version = "1.0.217"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5a9bf7cf98d04a2b28aead066b7496853d4779c9cc183c440dbac457641e19a0"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.96",
+]
+
+[[package]]
+name = "serde_json"
+version = "1.0.135"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2b0d7ba2887406110130a978386c4e1befb98c674b4fba677954e4db976630d9"
+dependencies = [
+ "itoa",
+ "memchr",
+ "ryu",
+ "serde",
+]
+
 [[package]]
 name = "spin"
 version = "0.9.8"
@@ -213,9 +266,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.39"
+version = "2.0.96"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "23e78b90f2fcf45d3e842032ce32e3f2d1545ba6636271dcbf24fa306d87be7a"
+checksum = "d5d0adab1ae378d7f53bdebc67a39f1f151407ef230f0ce2883572f5d8985c80"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/user/merger/Cargo.toml b/user/merger/Cargo.toml
index 976c17fa..4d3d21c9 100644
--- a/user/merger/Cargo.toml
+++ b/user/merger/Cargo.toml
@@ -13,6 +13,7 @@ ms_std = { path = "../../ms_std", features = ["alloc_def", "unwinding"] }
 ms_hostcall = { path = "../../ms_hostcall" }
 ms_std_proc_macro = { path = "../../ms_std_proc_macro" }
 heapless = "0.8.0"
+serde = { version = "1.0.217", default-features = false, features = ["derive"] }
 
 [features]
 mpk = ["ms_std/mpk"]
diff --git a/user/merger/src/lib.rs b/user/merger/src/lib.rs
index 58089336..d20809b5 100644
--- a/user/merger/src/lib.rs
+++ b/user/merger/src/lib.rs
@@ -7,13 +7,14 @@ use ms_std::{
     time::{SystemTime, UNIX_EPOCH},
 };
 use ms_std_proc_macro::FaasData;
+use serde::{Deserialize, Serialize};
 
 #[cfg(feature = "pkey_per_func")]
 type NumberArray = heapless::Vec<u32, { 20 * 1024 * 1024 }>;
 #[cfg(not(feature = "pkey_per_func"))]
 type NumberArray = Vec<u32>;
 
-#[derive(Default, FaasData)]
+#[derive(Default, FaasData, Serialize, Deserialize)]
 struct VecArg {
     #[cfg(feature = "pkey_per_func")]
     array: heapless::Vec<u32, { 20 * 1024 * 1024 }>,
diff --git a/user/reducer/Cargo.lock b/user/reducer/Cargo.lock
index 04a771a1..c4df4b64 100644
--- a/user/reducer/Cargo.lock
+++ b/user/reducer/Cargo.lock
@@ -79,6 +79,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "290f1a1d9242c78d09ce40a5e87e7554ee637af1351968159f4952f028f75604"
 dependencies = [
  "ahash",
+ "serde",
 ]
 
 [[package]]
@@ -91,6 +92,12 @@ dependencies = [
  "stable_deref_trait",
 ]
 
+[[package]]
+name = "itoa"
+version = "1.0.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d75a2a4b1b190afb6f5425f10f6a8f959d2ea0b9c2b1d79553551850539e4674"
+
 [[package]]
 name = "libc"
 version = "0.2.150"
@@ -116,6 +123,12 @@ dependencies = [
  "scopeguard",
 ]
 
+[[package]]
+name = "memchr"
+version = "2.7.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "78ca9ab1a0babb1e7d5695e3530886289c18cf2f87ec19a575a0abdce112e3a3"
+
 [[package]]
 name = "ms_hostcall"
 version = "0.1.0"
@@ -134,6 +147,8 @@ dependencies = [
  "linked_list_allocator",
  "ms_hostcall",
  "ms_std_proc_macro",
+ "serde",
+ "serde_json",
  "spin",
  "thiserror-no-std",
  "unwinding",
@@ -145,7 +160,7 @@ version = "0.1.0"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 1.0.109",
 ]
 
 [[package]]
@@ -156,18 +171,18 @@ checksum = "dd8b5dd2ae5ed71462c540258bedcb51965123ad7e7ccf4b9a8cafaa4a63576d"
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.70"
+version = "1.0.93"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "39278fbbf5fb4f646ce651690877f89d1c5811a3d4acb27700c1cb3cdb78fd3b"
+checksum = "60946a68e5f9d28b0dc1c21bb8a97ee7d018a8b322fa57838ba31cc878e22d99"
 dependencies = [
  "unicode-ident",
 ]
 
 [[package]]
 name = "quote"
-version = "1.0.33"
+version = "1.0.38"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5267fca4496028628a95160fc423a33e8b2e6af8a5302579e322e4b520293cae"
+checksum = "0e4dccaaaf89514f546c693ddc140f729f958c247918a13380cccc6078391acc"
 dependencies = [
  "proc-macro2",
 ]
@@ -181,6 +196,7 @@ dependencies = [
  "ms_hostcall",
  "ms_std",
  "ms_std_proc_macro",
+ "serde",
 ]
 
 [[package]]
@@ -192,6 +208,12 @@ dependencies = [
  "semver",
 ]
 
+[[package]]
+name = "ryu"
+version = "1.0.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f3cb5ba0dc43242ce17de99c180e96db90b235b8a9fdc9543c96d2209116bd9f"
+
 [[package]]
 name = "scopeguard"
 version = "1.2.0"
@@ -204,6 +226,38 @@ version = "1.0.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "836fa6a3e1e547f9a2c4040802ec865b5d85f4014efe00555d7090a3dcaa1090"
 
+[[package]]
+name = "serde"
+version = "1.0.217"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "02fc4265df13d6fa1d00ecff087228cc0a2b5f3c0e87e258d8b94a156e984c70"
+dependencies = [
+ "serde_derive",
+]
+
+[[package]]
+name = "serde_derive"
+version = "1.0.217"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5a9bf7cf98d04a2b28aead066b7496853d4779c9cc183c440dbac457641e19a0"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.96",
+]
+
+[[package]]
+name = "serde_json"
+version = "1.0.135"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2b0d7ba2887406110130a978386c4e1befb98c674b4fba677954e4db976630d9"
+dependencies = [
+ "itoa",
+ "memchr",
+ "ryu",
+ "serde",
+]
+
 [[package]]
 name = "spin"
 version = "0.9.8"
@@ -241,9 +295,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.39"
+version = "2.0.96"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "23e78b90f2fcf45d3e842032ce32e3f2d1545ba6636271dcbf24fa306d87be7a"
+checksum = "d5d0adab1ae378d7f53bdebc67a39f1f151407ef230f0ce2883572f5d8985c80"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -309,5 +363,5 @@ checksum = "dd7e48ccf166952882ca8bd778a43502c64f33bf94c12ebe2a7f08e5a0f6689f"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 2.0.96",
 ]
diff --git a/user/reducer/Cargo.toml b/user/reducer/Cargo.toml
index cd3c3247..3082e2e1 100644
--- a/user/reducer/Cargo.toml
+++ b/user/reducer/Cargo.toml
@@ -14,7 +14,11 @@ ms_hostcall = { path = "../../ms_hostcall" }
 ms_std_proc_macro = { path = "../../ms_std_proc_macro" }
 
 heapless = { version = "0.8.0", default-features = false }
-hashbrown = { version = "0.14", default-features = false, features = ["ahash"] }
+hashbrown = { version = "0.14", default-features = false, features = [
+    "ahash",
+    "serde",
+] }
+serde = { version = "1.0.217", default-features = false, features = ["derive"] }
 
 [features]
 mpk = ["ms_std/mpk"]
diff --git a/user/reducer/src/lib.rs b/user/reducer/src/lib.rs
index a671bdd5..57a4705d 100644
--- a/user/reducer/src/lib.rs
+++ b/user/reducer/src/lib.rs
@@ -14,10 +14,11 @@ use ms_std::{
     time::{SystemTime, UNIX_EPOCH},
 };
 use ms_std_proc_macro::FaasData;
+use serde::{Deserialize, Serialize};
 
 extern crate alloc;
 
-#[derive(FaasData)]
+#[derive(FaasData, Serialize, Deserialize, Default)]
 struct Mapper2Reducer {
     #[cfg(feature = "pkey_per_func")]
     shuffle: heapless::FnvIndexMap<heapless::String<32>, u32, 1024>,
diff --git a/user/simple_file/Cargo.lock b/user/simple_file/Cargo.lock
index 20985b30..90894a2d 100644
--- a/user/simple_file/Cargo.lock
+++ b/user/simple_file/Cargo.lock
@@ -70,6 +70,12 @@ dependencies = [
  "stable_deref_trait",
 ]
 
+[[package]]
+name = "itoa"
+version = "1.0.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d75a2a4b1b190afb6f5425f10f6a8f959d2ea0b9c2b1d79553551850539e4674"
+
 [[package]]
 name = "libc"
 version = "0.2.150"
@@ -95,6 +101,12 @@ dependencies = [
  "scopeguard",
 ]
 
+[[package]]
+name = "memchr"
+version = "2.7.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "78ca9ab1a0babb1e7d5695e3530886289c18cf2f87ec19a575a0abdce112e3a3"
+
 [[package]]
 name = "ms_hostcall"
 version = "0.1.0"
@@ -113,6 +125,8 @@ dependencies = [
  "linked_list_allocator",
  "ms_hostcall",
  "ms_std_proc_macro",
+ "serde",
+ "serde_json",
  "spin",
  "thiserror-no-std",
  "unwinding",
@@ -124,23 +138,23 @@ version = "0.1.0"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 1.0.109",
 ]
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.70"
+version = "1.0.93"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "39278fbbf5fb4f646ce651690877f89d1c5811a3d4acb27700c1cb3cdb78fd3b"
+checksum = "60946a68e5f9d28b0dc1c21bb8a97ee7d018a8b322fa57838ba31cc878e22d99"
 dependencies = [
  "unicode-ident",
 ]
 
 [[package]]
 name = "quote"
-version = "1.0.33"
+version = "1.0.38"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5267fca4496028628a95160fc423a33e8b2e6af8a5302579e322e4b520293cae"
+checksum = "0e4dccaaaf89514f546c693ddc140f729f958c247918a13380cccc6078391acc"
 dependencies = [
  "proc-macro2",
 ]
@@ -154,6 +168,12 @@ dependencies = [
  "semver",
 ]
 
+[[package]]
+name = "ryu"
+version = "1.0.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f3cb5ba0dc43242ce17de99c180e96db90b235b8a9fdc9543c96d2209116bd9f"
+
 [[package]]
 name = "scopeguard"
 version = "1.2.0"
@@ -166,6 +186,38 @@ version = "1.0.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "836fa6a3e1e547f9a2c4040802ec865b5d85f4014efe00555d7090a3dcaa1090"
 
+[[package]]
+name = "serde"
+version = "1.0.217"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "02fc4265df13d6fa1d00ecff087228cc0a2b5f3c0e87e258d8b94a156e984c70"
+dependencies = [
+ "serde_derive",
+]
+
+[[package]]
+name = "serde_derive"
+version = "1.0.217"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5a9bf7cf98d04a2b28aead066b7496853d4779c9cc183c440dbac457641e19a0"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.96",
+]
+
+[[package]]
+name = "serde_json"
+version = "1.0.135"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2b0d7ba2887406110130a978386c4e1befb98c674b4fba677954e4db976630d9"
+dependencies = [
+ "itoa",
+ "memchr",
+ "ryu",
+ "serde",
+]
+
 [[package]]
 name = "simple_file"
 version = "0.1.0"
@@ -212,9 +264,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.39"
+version = "2.0.96"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "23e78b90f2fcf45d3e842032ce32e3f2d1545ba6636271dcbf24fa306d87be7a"
+checksum = "d5d0adab1ae378d7f53bdebc67a39f1f151407ef230f0ce2883572f5d8985c80"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/user/simple_http/Cargo.lock b/user/simple_http/Cargo.lock
index ef9febd9..20707ddf 100644
--- a/user/simple_http/Cargo.lock
+++ b/user/simple_http/Cargo.lock
@@ -70,6 +70,12 @@ dependencies = [
  "stable_deref_trait",
 ]
 
+[[package]]
+name = "itoa"
+version = "1.0.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d75a2a4b1b190afb6f5425f10f6a8f959d2ea0b9c2b1d79553551850539e4674"
+
 [[package]]
 name = "libc"
 version = "0.2.152"
@@ -95,6 +101,12 @@ dependencies = [
  "scopeguard",
 ]
 
+[[package]]
+name = "memchr"
+version = "2.7.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "78ca9ab1a0babb1e7d5695e3530886289c18cf2f87ec19a575a0abdce112e3a3"
+
 [[package]]
 name = "ms_hostcall"
 version = "0.1.0"
@@ -113,6 +125,8 @@ dependencies = [
  "linked_list_allocator",
  "ms_hostcall",
  "ms_std_proc_macro",
+ "serde",
+ "serde_json",
  "spin",
  "thiserror-no-std",
  "unwinding",
@@ -124,23 +138,23 @@ version = "0.1.0"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 1.0.109",
 ]
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.70"
+version = "1.0.93"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "39278fbbf5fb4f646ce651690877f89d1c5811a3d4acb27700c1cb3cdb78fd3b"
+checksum = "60946a68e5f9d28b0dc1c21bb8a97ee7d018a8b322fa57838ba31cc878e22d99"
 dependencies = [
  "unicode-ident",
 ]
 
 [[package]]
 name = "quote"
-version = "1.0.33"
+version = "1.0.38"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5267fca4496028628a95160fc423a33e8b2e6af8a5302579e322e4b520293cae"
+checksum = "0e4dccaaaf89514f546c693ddc140f729f958c247918a13380cccc6078391acc"
 dependencies = [
  "proc-macro2",
 ]
@@ -154,6 +168,12 @@ dependencies = [
  "semver",
 ]
 
+[[package]]
+name = "ryu"
+version = "1.0.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f3cb5ba0dc43242ce17de99c180e96db90b235b8a9fdc9543c96d2209116bd9f"
+
 [[package]]
 name = "scopeguard"
 version = "1.2.0"
@@ -166,6 +186,38 @@ version = "1.0.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "836fa6a3e1e547f9a2c4040802ec865b5d85f4014efe00555d7090a3dcaa1090"
 
+[[package]]
+name = "serde"
+version = "1.0.217"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "02fc4265df13d6fa1d00ecff087228cc0a2b5f3c0e87e258d8b94a156e984c70"
+dependencies = [
+ "serde_derive",
+]
+
+[[package]]
+name = "serde_derive"
+version = "1.0.217"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5a9bf7cf98d04a2b28aead066b7496853d4779c9cc183c440dbac457641e19a0"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.96",
+]
+
+[[package]]
+name = "serde_json"
+version = "1.0.135"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2b0d7ba2887406110130a978386c4e1befb98c674b4fba677954e4db976630d9"
+dependencies = [
+ "itoa",
+ "memchr",
+ "ryu",
+ "serde",
+]
+
 [[package]]
 name = "simple_http"
 version = "0.1.0"
@@ -210,9 +262,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.39"
+version = "2.0.96"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "23e78b90f2fcf45d3e842032ce32e3f2d1545ba6636271dcbf24fa306d87be7a"
+checksum = "d5d0adab1ae378d7f53bdebc67a39f1f151407ef230f0ce2883572f5d8985c80"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/user/sorter/Cargo.lock b/user/sorter/Cargo.lock
index 397dfc15..dbd0c349 100644
--- a/user/sorter/Cargo.lock
+++ b/user/sorter/Cargo.lock
@@ -70,6 +70,12 @@ dependencies = [
  "stable_deref_trait",
 ]
 
+[[package]]
+name = "itoa"
+version = "1.0.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d75a2a4b1b190afb6f5425f10f6a8f959d2ea0b9c2b1d79553551850539e4674"
+
 [[package]]
 name = "libc"
 version = "0.2.150"
@@ -95,6 +101,12 @@ dependencies = [
  "scopeguard",
 ]
 
+[[package]]
+name = "memchr"
+version = "2.7.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "78ca9ab1a0babb1e7d5695e3530886289c18cf2f87ec19a575a0abdce112e3a3"
+
 [[package]]
 name = "ms_hostcall"
 version = "0.1.0"
@@ -113,6 +125,8 @@ dependencies = [
  "linked_list_allocator",
  "ms_hostcall",
  "ms_std_proc_macro",
+ "serde",
+ "serde_json",
  "spin",
  "thiserror-no-std",
  "unwinding",
@@ -124,23 +138,23 @@ version = "0.1.0"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 1.0.109",
 ]
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.70"
+version = "1.0.93"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "39278fbbf5fb4f646ce651690877f89d1c5811a3d4acb27700c1cb3cdb78fd3b"
+checksum = "60946a68e5f9d28b0dc1c21bb8a97ee7d018a8b322fa57838ba31cc878e22d99"
 dependencies = [
  "unicode-ident",
 ]
 
 [[package]]
 name = "quote"
-version = "1.0.33"
+version = "1.0.38"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5267fca4496028628a95160fc423a33e8b2e6af8a5302579e322e4b520293cae"
+checksum = "0e4dccaaaf89514f546c693ddc140f729f958c247918a13380cccc6078391acc"
 dependencies = [
  "proc-macro2",
 ]
@@ -154,6 +168,12 @@ dependencies = [
  "semver",
 ]
 
+[[package]]
+name = "ryu"
+version = "1.0.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f3cb5ba0dc43242ce17de99c180e96db90b235b8a9fdc9543c96d2209116bd9f"
+
 [[package]]
 name = "scopeguard"
 version = "1.2.0"
@@ -166,6 +186,38 @@ version = "1.0.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "836fa6a3e1e547f9a2c4040802ec865b5d85f4014efe00555d7090a3dcaa1090"
 
+[[package]]
+name = "serde"
+version = "1.0.217"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "02fc4265df13d6fa1d00ecff087228cc0a2b5f3c0e87e258d8b94a156e984c70"
+dependencies = [
+ "serde_derive",
+]
+
+[[package]]
+name = "serde_derive"
+version = "1.0.217"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5a9bf7cf98d04a2b28aead066b7496853d4779c9cc183c440dbac457641e19a0"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.96",
+]
+
+[[package]]
+name = "serde_json"
+version = "1.0.135"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2b0d7ba2887406110130a978386c4e1befb98c674b4fba677954e4db976630d9"
+dependencies = [
+ "itoa",
+ "memchr",
+ "ryu",
+ "serde",
+]
+
 [[package]]
 name = "sorter"
 version = "0.1.0"
@@ -174,6 +226,7 @@ dependencies = [
  "ms_hostcall",
  "ms_std",
  "ms_std_proc_macro",
+ "serde",
 ]
 
 [[package]]
@@ -213,9 +266,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.39"
+version = "2.0.96"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "23e78b90f2fcf45d3e842032ce32e3f2d1545ba6636271dcbf24fa306d87be7a"
+checksum = "d5d0adab1ae378d7f53bdebc67a39f1f151407ef230f0ce2883572f5d8985c80"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/user/sorter/Cargo.toml b/user/sorter/Cargo.toml
index 6565e72b..057bd3e7 100644
--- a/user/sorter/Cargo.toml
+++ b/user/sorter/Cargo.toml
@@ -13,6 +13,7 @@ ms_std = { path = "../../ms_std", features = ["alloc_def", "unwinding"] }
 ms_hostcall = { path = "../../ms_hostcall" }
 ms_std_proc_macro = { path = "../../ms_std_proc_macro" }
 heapless = "0.8.0"
+serde = { version = "1.0.217", default-features = false, features = ["derive"] }
 
 [features]
 mpk = ["ms_std/mpk"]
diff --git a/user/sorter/src/lib.rs b/user/sorter/src/lib.rs
index 1d375005..79fa11c5 100644
--- a/user/sorter/src/lib.rs
+++ b/user/sorter/src/lib.rs
@@ -8,16 +8,17 @@ use ms_std::{
     time::{SystemTime, UNIX_EPOCH},
 };
 use ms_std_proc_macro::FaasData;
+use serde::{Deserialize, Serialize};
 
-#[derive(Default, FaasData)]
+#[derive(Default, FaasData, Serialize, Deserialize)]
 struct Reader2Sorter {
     #[cfg(feature = "pkey_per_func")]
-    raw_data: heapless::String<{ 110 * 1024 * 1024 }>,
+    content: heapless::String<{ 110 * 1024 * 1024 }>,
     #[cfg(not(feature = "pkey_per_func"))]
-    raw_data: String,
+    content: String,
 }
 
-#[derive(Default, FaasData)]
+#[derive(Default, FaasData, Serialize, Deserialize)]
 struct VecArg {
     #[cfg(feature = "pkey_per_func")]
     array: heapless::Vec<u32, { 20 * 1024 * 1024 }>,
@@ -53,12 +54,12 @@ pub fn main() -> Result<()> {
     println!(
         "sorter: input-part-{}, input length={}",
         my_id,
-        input.raw_data.len()
+        input.content.len()
     );
 
     let mut buffer: DataBuffer<VecArg> =
         DataBuffer::with_slot(format!("sorter-resp-part-{}", my_id));
-    for num in input.raw_data.split(',') {
+    for num in input.content.split(',') {
         let num = num.trim();
         if num.is_empty() {
             continue;
diff --git a/user/splitter/Cargo.lock b/user/splitter/Cargo.lock
index 6efe178c..1a6a5e07 100644
--- a/user/splitter/Cargo.lock
+++ b/user/splitter/Cargo.lock
@@ -70,6 +70,12 @@ dependencies = [
  "stable_deref_trait",
 ]
 
+[[package]]
+name = "itoa"
+version = "1.0.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d75a2a4b1b190afb6f5425f10f6a8f959d2ea0b9c2b1d79553551850539e4674"
+
 [[package]]
 name = "libc"
 version = "0.2.150"
@@ -95,6 +101,12 @@ dependencies = [
  "scopeguard",
 ]
 
+[[package]]
+name = "memchr"
+version = "2.7.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "78ca9ab1a0babb1e7d5695e3530886289c18cf2f87ec19a575a0abdce112e3a3"
+
 [[package]]
 name = "ms_hostcall"
 version = "0.1.0"
@@ -113,6 +125,8 @@ dependencies = [
  "linked_list_allocator",
  "ms_hostcall",
  "ms_std_proc_macro",
+ "serde",
+ "serde_json",
  "spin",
  "thiserror-no-std",
  "unwinding",
@@ -124,23 +138,23 @@ version = "0.1.0"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 1.0.109",
 ]
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.70"
+version = "1.0.93"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "39278fbbf5fb4f646ce651690877f89d1c5811a3d4acb27700c1cb3cdb78fd3b"
+checksum = "60946a68e5f9d28b0dc1c21bb8a97ee7d018a8b322fa57838ba31cc878e22d99"
 dependencies = [
  "unicode-ident",
 ]
 
 [[package]]
 name = "quote"
-version = "1.0.33"
+version = "1.0.38"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5267fca4496028628a95160fc423a33e8b2e6af8a5302579e322e4b520293cae"
+checksum = "0e4dccaaaf89514f546c693ddc140f729f958c247918a13380cccc6078391acc"
 dependencies = [
  "proc-macro2",
 ]
@@ -154,6 +168,12 @@ dependencies = [
  "semver",
 ]
 
+[[package]]
+name = "ryu"
+version = "1.0.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f3cb5ba0dc43242ce17de99c180e96db90b235b8a9fdc9543c96d2209116bd9f"
+
 [[package]]
 name = "scopeguard"
 version = "1.2.0"
@@ -166,6 +186,38 @@ version = "1.0.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "836fa6a3e1e547f9a2c4040802ec865b5d85f4014efe00555d7090a3dcaa1090"
 
+[[package]]
+name = "serde"
+version = "1.0.217"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "02fc4265df13d6fa1d00ecff087228cc0a2b5f3c0e87e258d8b94a156e984c70"
+dependencies = [
+ "serde_derive",
+]
+
+[[package]]
+name = "serde_derive"
+version = "1.0.217"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5a9bf7cf98d04a2b28aead066b7496853d4779c9cc183c440dbac457641e19a0"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.96",
+]
+
+[[package]]
+name = "serde_json"
+version = "1.0.135"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2b0d7ba2887406110130a978386c4e1befb98c674b4fba677954e4db976630d9"
+dependencies = [
+ "itoa",
+ "memchr",
+ "ryu",
+ "serde",
+]
+
 [[package]]
 name = "spin"
 version = "0.9.8"
@@ -192,6 +244,7 @@ dependencies = [
  "ms_hostcall",
  "ms_std",
  "ms_std_proc_macro",
+ "serde",
 ]
 
 [[package]]
@@ -213,9 +266,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.39"
+version = "2.0.96"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "23e78b90f2fcf45d3e842032ce32e3f2d1545ba6636271dcbf24fa306d87be7a"
+checksum = "d5d0adab1ae378d7f53bdebc67a39f1f151407ef230f0ce2883572f5d8985c80"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/user/splitter/Cargo.toml b/user/splitter/Cargo.toml
index 4e714605..bb2eb749 100644
--- a/user/splitter/Cargo.toml
+++ b/user/splitter/Cargo.toml
@@ -13,6 +13,7 @@ ms_std = { path = "../../ms_std", features = ["alloc_def", "unwinding"] }
 ms_hostcall = { path = "../../ms_hostcall" }
 ms_std_proc_macro = { path = "../../ms_std_proc_macro" }
 heapless = "0.8.0"
+serde = { version = "1.0.217", default-features = false, features = ["derive"] }
 
 [features]
 mpk = ["ms_std/mpk"]
diff --git a/user/splitter/src/lib.rs b/user/splitter/src/lib.rs
index fb11ef14..17f27958 100644
--- a/user/splitter/src/lib.rs
+++ b/user/splitter/src/lib.rs
@@ -8,8 +8,9 @@ use ms_std::{
     time::{SystemTime, UNIX_EPOCH},
 };
 use ms_std_proc_macro::FaasData;
+use serde::{Deserialize, Serialize};
 
-#[derive(Default, FaasData)]
+#[derive(Default, FaasData, Serialize, Deserialize)]
 struct VecArg {
     #[cfg(feature = "pkey_per_func")]
     array: heapless::Vec<u32, { 20 * 1024 * 1024 }>,
diff --git a/wasmtime_wasi_api/Cargo.toml b/wasmtime_wasi_api/Cargo.toml
index 6b73f0b9..e1f355c0 100644
--- a/wasmtime_wasi_api/Cargo.toml
+++ b/wasmtime_wasi_api/Cargo.toml
@@ -6,8 +6,10 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-ms_std = { path = "../ms_std", default-features = false }
-ms_hostcall = { path = "../ms_hostcall", default-features = false, features = ["signal"]  }
+ms_std = { path = "../ms_std", default-features = false, features = [] }
+ms_hostcall = { path = "../ms_hostcall", default-features = false, features = [
+    "signal",
+] }
 ms_std_proc_macro = { path = "../ms_std_proc_macro" }
 spin = "0.9.8"
 hashbrown = { version = "0.14", default-features = false, features = ["ahash"] }